Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
1 answer
how do I retrieve my account from my previous mac
I had Microsoft office on my old computer....I need to transfer to my new mac
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
asked
2026-06-01T23:24:26.12+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(57.599999999999994, 57.00000000000001%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESK%3C/text%3E%3C/svg%3E)
Steven Kinnally
0
Reputation points
commented
2026-11-12T21:13:29.7533333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(185.6, 45%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGC%3C/text%3E%3C/svg%3E)
Germain, Christine
0
Reputation points
1 answer
Office 2024 won't activate on my Mac
I bought Office 2024 for my Mac and installed it but it won't activate - it reverts to saying my license is out of date and I can't use products. I uninstalled it and ran the license removal tool then reinstalled it but it still won't work
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-12T14:04:18.25+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(288, 68%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJD%3C/text%3E%3C/svg%3E)
Julia Doggart
0
Reputation points
answered
2026-11-12T14:53:35.5666667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(201.6, 0%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAK%3C/text%3E%3C/svg%3E)
Adeel Khan
570
Reputation points
3 answers
How to reinstall Office 2021 for my Mac
After updating the MS Office apps through App Store I lost my licence to Office 2021 because the apps do not find the licences although I have logged in with the same account that I have made the purchase in the past. As I needed MS Office tools…
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-09T19:23:40.6+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(268.8, 20%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAA%3C/text%3E%3C/svg%3E)
Andris Altsaar
0
Reputation points
commented
2026-11-12T10:44:49.3266667+00:00
Stefan Blom
357.6K
Reputation points MVP
Volunteer Moderator
2 answers
How to install Microsoft on Mac with older operating system
Install Microsoft 365 Office build compatible with macOS Catalina 10.15.7, instead of the current installer that requires a newer macOS version.
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(240, 44%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ET%3C/text%3E%3C/svg%3E)
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(22.400000000000002, 26%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EVT%3C/text%3E%3C/svg%3E)
1 answer
Automatic update to version require Mac OS 15, but mine limited with Mac OS Sonoma 14.8.9. Need installer for 14
Apps like excel and words automatically updated to version that require Mac OS 15, but my Mac Book Air 2018 cannot be updated to 15. Now files opened cannot be edited. two message. One for activate and while I already started the one month trial path…
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-12T07:23:25.42+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(115.19999999999999, 0%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHL%3C/text%3E%3C/svg%3E)
Hogan Lau
0
Reputation points
answered
2026-11-12T08:16:52.08+00:00
GsN5034 - IA
80,095
Reputation points
Independent Advisor
2 answers
I can't login to my subscription to Microsoft 365 on my Mac.
My Mac is up to date. I've closed any Microsoft apps. I've tried deleting keychains. Then restarting computer. I know my Microsoft Login Works because I can access it on the internet and I can see my Microsoft 365 subscription is active. But I can't log…
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-11T21:08:08.8766667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(6.4, 36%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAB%3C/text%3E%3C/svg%3E)
Anna Bromeland
0
Reputation points
answered
2026-11-12T01:38:37.2566667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(22.400000000000002, 80%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ENL%3C/text%3E%3C/svg%3E)
Norah-L
13,605
Reputation points Microsoft External Staff
Moderator
4 answers
Unknown error when activating Office license on Mac
Can you help please. I wish to activate my Office Home & Student 2021 but am prevented by an Unknown Error. What are my next steps to activate my purchased Office software?
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-11T02:19:24.21+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(166.4, 96%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMV%3C/text%3E%3C/svg%3E)
Michael Vallance
5
Reputation points
commented
2026-11-12T01:38:06.8233333+00:00
Michael Vallance
5
Reputation points
2 answers
Installing Microsoft on MacBook with older operating system
I am unable to install Microsoft on my Macbook with an older operating system. I recently purchased Microsoft 365 and I want to install it on my computer without needing to go to the web to use online version.
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
2 answers
autoupdate says some apps have encountered errors
When I invoke autoupdate it does not finish, it just says some apps have encountered errors..
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-10-27T12:04:19.2666667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(76.8, 49%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMS%3C/text%3E%3C/svg%3E)
Margot Schiemann
0
Reputation points
commented
2026-11-11T16:55:39.26+00:00
Stefan Blom
357.6K
Reputation points MVP
Volunteer Moderator
2 answers
Daughter cannot access Microsoft office 365
Hi I subscribe to Microsoft 365 (Family). My daughter took advantage of one of the 5 extra licences which come with the package. It has worked fine for a number of years with no issues. However she cannot now log into Microsoft office, telling her…
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-11T14:06:21.1333333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(115.19999999999999, 54%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJM%3C/text%3E%3C/svg%3E)
James McNally
0
Reputation points
answered
2026-11-11T16:00:53.5866667+00:00
GsN5034 - IA
80,095
Reputation points
Independent Advisor
1 answer
purchased office home 2024 for Mac OS. won't take the code
5 hours and counting trying to get office 2024 installed on my Mac. It shows a message that my office 2019 is out of date and I have to update to office 365. it will not allow me to enter the purchase code for 2024. This is back end issue and MS…
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-10T18:15:26.3666667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(102.4, 6%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELR%3C/text%3E%3C/svg%3E)
lincoln rowley
0
Reputation points
commented
2026-11-11T15:44:40.54+00:00
EmilyS726
279.8K
Reputation points
Independent Advisor
1 answer
download my office software
my new home office software would not load on my new iMac so I had to remove ie. I now need to try to download it again
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-11T14:53:15.0666667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(288, 88%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EFG%3C/text%3E%3C/svg%3E)
Fiona Gregory
0
Reputation points
answered
2026-11-11T15:26:58.0066667+00:00
DaveM121
947.9K
Reputation points
Independent Advisor
2 answers
Microsoft 365 activation
I have an active Microsoft 365 subscription. I am using a MacBook Air 2017 running macOS Monterey 12.7.6. The latest Microsoft 365 installer requires a newer version of macOS, so I installed Office 16.89.1, which installs successfully. When I sign into…
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(76.8, 98%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETG%3C/text%3E%3C/svg%3E)
2 answers
MSFT Office does not work
ordered MSFT Office Home & Business 2021-DDP, been using it with no problems, recently it stopped working, reload it and updated my mac OS but nothing works
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(144, 39%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBS%3C/text%3E%3C/svg%3E)
1 answer
I am contacting you because I am unable to activate my genuine Microsoft Office Home & Student 2019 licence on my MacBook Pro, despite several attempts to resolve the problem.
Dear Microsoft Support Team, I am contacting you because I am unable to activate my genuine Microsoft Office Home & Student 2019 licence on my MacBook Pro, despite several attempts to resolve the problem. 1. My Office licence I purchased Office Home…
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-11T00:05:20.67+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(137.6, 24%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMW%3C/text%3E%3C/svg%3E)
Mohammad Wali Kakar
0
Reputation points
answered
2026-11-11T01:24:48.2933333+00:00
Bob Jones AKA CyberTaz MVP
438.6K
Reputation points
2 answers
After successfully installing Office Home 2024 I cannot open The Word, Excel, PPT apps on my MacBook Air.
I have tried multiple times to install Office Home 2024 but each time it completes I cannot open any of the Apps. I get various messages - when an App opens it says I need to purchase and activate Microsoft 365. When I try to open an App in the…
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-10T22:39:44.3866667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(252.8, 74%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELB%3C/text%3E%3C/svg%3E)
Leonie Boyle
0
Reputation points
answered
2026-11-10T23:30:23.4266667+00:00
Manoel Barros
23,460
Reputation points
Independent Advisor
2 answers
Multiple issues, billing, 365, and Teams
1- get charged monthly for Word, 365, and etc but can not download or use in my Mac, I believe there are duplicates 2- Unable to use W-365 3-having trouble using Teams
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-10T15:11:04.49+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(150.4, 33%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJA%3C/text%3E%3C/svg%3E)
Jacobo A Rivero MD, FAAFP
0
Reputation points
answered
2026-11-10T15:57:47.98+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(89.60000000000001, 72%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESI%3C/text%3E%3C/svg%3E)
SD - IA
183.1K
Reputation points
Independent Advisor
1 answer
One of the answers was accepted by the question author.
problems adding an outlook account to my new macbook
I have tried over the last few days to add an existing outlook account to my new Mac book air. There are no drop down menus which allow me to do this.Either via mail or via my outlook account.
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-06T15:33:33.77+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(272, 1%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJW%3C/text%3E%3C/svg%3E)
Jenny Wheeldon
20
Reputation points
accepted
2026-11-10T15:24:49.1666667+00:00
Jenny Wheeldon
20
Reputation points
2 answers
I purchased and installed a microsoft 365 basic subscription. Activating the license fails with an error code of 0.
I purchased and installed a microsoft 365 basic subscription. Activating the license fails with error code 0. Initially in 2025 I had purchased/installed Office home and student 2021. I had cancelled that subscription in 2025. I then switched to the…
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-10T01:08:50.5733333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(153.6, 40%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJB%3C/text%3E%3C/svg%3E)
J B
0
Reputation points
answered
2026-11-10T02:43:46.2666667+00:00
GsN5034 - IA
80,095
Reputation points
Independent Advisor
2 answers
Not able to access Microsoft products after installation
I have installed Microsoft Office for Mac OS but when I open any of the applications it says that I need to purchase again. What is going on? How can I access the applications (Word, Excell...)?
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
3,076 questions
asked
2026-11-10T00:09:18.1866667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(281.6, 30%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAM%3C/text%3E%3C/svg%3E)
Andrew Mohnasky
0
Reputation points
answered
2026-11-10T00:51:15.5533333+00:00
Manoel Barros
23,460
Reputation points
Independent Advisor