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Since the afternoon of July 16th I have received a "0x0 Error" each time I attempt to link my new Microsoft 365 subscription to my MacBook. I have updated my IOS, closed 365 completely and restarted the computer entirely. I've been unable to create a different result than the "0x0 Error."
A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hello
In order for me to determine troubleshooting direction, I need to know, what's your current MacOS version after you updated it?
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I have macOS Tahoe -- still won't work. It's NOT the macOS system, it's a Microsoft 365 issue that they have still not resolved. And no one will call you. I have a useless subscription and no way to create, edit or save documents.
Susan, knowing the MacOS is to determine if OP needs to install downgraded Office, or if OP's MacOS is no longer supported. So yes, having that information is critical to start the troubleshooting process.
However, since yours is Tahoe, this issue CAN be fixed. See this thread as example: https://learn.microsoft.com/en-us/answers/questions/5948053/locked-out-of-ms365-apps-as-part-of-jul-13-securit
I also have summarized it here: https://learn.microsoft.com/en-us/answers/questions/5946759/0x0-error-after-mac-update-july-14th-2026
The problem I have is me...I am not technical at all, so I just get lost looking at the list of things to do. I'm terrified I will do something wrong. I couldn't follow what you advised Peter to do. I need someone to walk me through it, but Microsoft tech support I imagine is swamped so they won't call. Another issue...they use the same number, which my iPhone tagged as spam so I blocked it. Now can't unblock it. A total mess.
I downloaded the latest Tahoe update yesterday. That didn't have any effect on the issue with Excel.
Ok Marc, you are way too ahead of me. I haven't given you any instruction yet. I was just gathering information so I could give you the relevant info. I didn't suggest that updating to Tahoe was the solution.
Since you have Tahoe, you need to do this to fix the issue.
First, see if you can update your Office apps. Open Word for example, click on the 'Help' tab >Check for Updates. Make sure you choose Update All when prompted. Let the process run through, can take a bit time. See if that works.
Otherwise, use the Update method in this article: https://support.microsoft.com/support/known-issues/unknown-error-0x0-license-not-found-error-microsoft365-macos
If it still doesn't work, please uninstall the apps. Follow the instructions here for complete uninstall.
Then reinstall this way:
If you signed up via Apple App Store, then download and install from the App Store.
If you signed up via Microsoft directly, Please go to https://www.office.com
Sign into the Microsoft account you used for the subscription. Click on the 9-dot icon on the upper left > More apps.
Then on the upper right, click on "Install apps". This will now download the installer file. Once downloaded, click on the file to install. It will install the Desktop version of the apps for you then.
To be clear: I'm able to go through the authentication process. I can log in and trigger the code to be sent to my email or my phone. However, when I enter the six-digit authentication code a webpage loads that says "You are seeing a page that is not normally shown" before it triggers the "0x0" error. I'm proving that I have the associated email, a Microsoft password and the device needed to receive the six-digit code but I can't get into Excel.
This is not about whether you legitimately own the license. On July 13th, a digital license has to be updated on all macOS 12 and above. This triggered a series of issues for all Mac devices.
There are different steps you can do for MacOS 12-14, and 14+. While MacOS 12 and under is completely not supported.
This is why I wanted to know what MacOS you are having so I can grab the right set of instructions. Have you got the chance to run through the steps I laid out in a previous comment?
@Susan Petrarca If you see this, I figured it out! I checked two things: First was my latest version of Excel. I realized I hadn't updated Excel in FIVE YEARS. That did not solve the problem but Excel looks completely different now. What did solve the problem: I completely re-downloaded Microsoft 365 to my computer. When the download completed I went to Excel and the subscription note at the top had disappeared and I was able to edit. I hope this helps you.
I did see this, and thankyou so much, but I fixed it with a completely different solution, with the help of a Microsoft Chat partner. In Word, clicked on About Microsoft Word, and saw "License: Not Activated" in the box. So I completely signed out of Word, waited 15 seconds, and signed back in with email I use on my account. Clicked on About Microsoft Word and ta da...said License: Microsoft 365 Personal, and my email. My docs came up editable and savable. It was like the software version of Unplug, wait 15, then plug back in!
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Sign in to your Microsoft account and confirm your Microsoft 365 subscription shows as Active and is associated with the same email address you're using in Office. Sign out of all office apps(better reinstall office), Clear cached credentials( From Keychain Access).
Just says Manage Subscription. Not sure where it would say Active.
I'm not a technical person. None of these solutions make sense to me. Sorry.
Yes, it does say there is an active 365 account.