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Outlook keeps prompting for password ONLY when accessing the Calendar

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Wednesday, January 27, 2016 5:31 PM

 

Hello all,

We've got AD on premises and Office 365 linked together. We have one particular user who we will name Sarah who's having a very strange issue.

She logs in with her Windows credentials, then she opens Outlook 2013,sometimes it asks for her password sometimes it doesn't. The funny thing is that, the first time she clicks on Calendar, it will prompt for her password.

It doesn't matter how many times you type her email address and password that Outlook will not take it. Even more strangely, when clicking on Cancel it allows to see her calendar.

She's got permissions over several Calendar and various mailboxes. I have been trying to narrow the cause down with no success. If you open her account in Office 365 portal, she does not get any issue with the calendars.

I have deleted the credentials from the vault, recreated her Outlook profile. I have asked her to log in from another machine to see if Outlook behaves the same, which it did.

There are no logon scripts, bats or anything like that. Only folder redirections pointing to the fileserver.

It's not a big issue but it is a big annoyance. I am even thinking of creating a new user and see if that helps and then associate it with her mailbox but I'd like to try this last.

Does anyone has experienced any issues at all regarding this?

All replies (7)

Thursday, January 28, 2016 3:02 AM

By "the vault", you are referring to Credential Manager in the Control Panel? If not, check there and delete all entries connecting to Office 365. Close Outlook and Lync/Skype for Business (kill the processes completely or restart the PC). 

Other than that, I got nothing.

Thursday, January 28, 2016 9:23 AM

Hi Trana,

 Yes, I was referring to the Credential Manager in Control Panel (W7 Pro x64). 

Hopefully someone will know where this issue comes from, probably from somewhere very silly that I missed :)

Thanks for your advice. 

Thursday, January 28, 2016 9:24 AM | 1 vote

Hi,

Are you using Outlook in Cached mode? Please check the following settings in Outlook:

  1. Open Outlook, click File > Account Settings > Account Settings.
  2. Click Change > More Settings > Advanced tab. uncheck "Download shared folders" to have a try.
  3. Click Apply > OK > Next > Finish.

Additionally, please try Trana's suggestion to clear credentials in Control Pane:

1. Launch the Credential Manager from Control Panel > All Control Panel Items > Credential Manager.
2. In the Generic Credentials section you’ll see a setting for [MS Outlook] which will include your SSO details. Click the downward-pointing arrow to the right of that value.
3. In the expand details, click Remove from vault. Then Outlook will no longer have a stored copy of your password.

Regards,

Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected].

Winnie Liang
TechNet Community Support

Friday, January 29, 2016 5:28 AM

Winnie is right, I have found that that tickbox can help with this issue, in fact I've disabled the Download shared folders via GPO in our network.

Friday, January 29, 2016 5:59 PM

Hi all,

Thank you very much for your solutions but none of these seem to work.

There is something that is really bugging me off about this case:

As mentioned before we have Active Directory on premises synchronized with Exchange (Office 365). I have set the user's email account on a new profile in Outlook on my computer at home and no issues when clicking of Calendar.

She has tried to log into several machines in her office encountering the same issue. Funnily I created a new AD account and linked it to her mailbox. Same issue.

I created a local account on her machine and... it is not happening.

I mean this is not a solution but something that might help me find what the cause is. There are no logon scripts or anything similar. 

Any settings of the roaming profile? what could be hapening here? 

Sunday, January 31, 2016 10:52 PM

1. Do you have a proxy restricting web access for your domain users that would not apply to the local user?

If she has calendar items received from external parties with images that reference an external website, the authentication prompt could be because those calendar items are trying to load the image on some external websites and your proxy is preventing it/requiring authentication. 

Something random like that, I would guess its not her Calendar as a whole, its rather one or several calendar items from 1 organizer. 

2. You could try and export her calendar items to PST and mount that on your Outlook to see if you can replicate the issue.

3. Just as a test, it be interested to know if completely turning off cached Exchange mode would help, not just the shared folders like mentioned before, but the entire mailbox. 

Monday, February 1, 2016 11:49 AM

Hi,

Thank you very much for your response.

  1. There's no proxy that might be blocking it.

   2. Her PSTs have been  deleted, recreated, and mounted on my Outlook.

   3. Outlook cached and non cached mode have been tested.

The only thing that seems to work is to use a local admin account, which is not a solution.