I have an Office 365 subscription through my work, after recently updating Office, every time I now open Word, Excel or PowerPoint, I am prompted to sign in and activate the product. When I try to, I get this error “Another account from your organisation is already signed in on this device". I have tried multiple suggestions as follow : Delete all Keychain entries relating to Office Uninstall Office and reinstall it via portal.office.com Install removal license tool Remove all Outlook accounts and add them (as suggested here https://answers.microsoft.com/en-us/msoffice/forum/all/word-and-excel-keep-prompting-for-activation-every/a055b722-574f-4dbc-974d-a8a336a119e7?messageId=c0435c83-9040-4180-8a22-d8f5850509c1 ) My Office apps are all up to date and I am running macOS Monterey Version 12.6. Excel for Mac version is 16.68. Thank you for your support. [Moved from Subscription, account, billing/For Business/Accounts, groups management, and sign in] EDIT : upgrading to macOS Ventura (13.0.1) didn't solve the issue

Hi, The root cause was related to a shared mail box, I removed it from Outlook, and used office-reset tool to repair sign-in issue.

Hi, Did you ever figure out how to add a shared mailbox back? I'm running into the same issue but removing the shared mailbox isn't something we can do easily and live with day to day. Thanks!

Hi, No, the shared mailbox is still removed....

The solution is to use this tool : https://office-reset.com and select the following option : This download worked! Thank you so much!!!

I had been having similar problems on several clients' computers and this "office-reset" tool fixed them. Many thanks!

MacOS "Another account from your organisation is already signed in on this device"

Anonymous

I have an Office 365 subscription through my work, after recently updating Office, every time I now open Word, Excel or PowerPoint, I am prompted to sign in and activate the product. When I try to, I get this error “Another account from your organisation is already signed in on this device".

I have tried multiple suggestions as follow :

Delete all Keychain entries relating to Office
Uninstall Office and reinstall it via portal.office.com
Install removal license tool
Remove all Outlook accounts and add them (as suggested here https://answers.microsoft.com/en-us/msoffice/forum/all/word-and-excel-keep-prompting-for-activation-every/a055b722-574f-4dbc-974d-a8a336a119e7?messageId=c0435c83-9040-4180-8a22-d8f5850509c1)

My Office apps are all up to date and I am running macOS Monterey Version 12.6.

Excel for Mac version is 16.68.

Thank you for your support.

[Moved from Subscription, account, billing/For Business/Accounts, groups management, and sign in]

EDIT : upgrading to macOS Ventura (13.0.1) didn't solve the issue

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

75 answers

Anonymous

2022-11-23T08:42:39+00:00

Hi, The root cause was related to a shared mail box, I removed it from Outlook, and used office-reset tool to repair sign-in issue.
Was this answer helpful?

7 people found this answer helpful.

0 comments No comments
Anonymous

2022-12-13T18:42:20+00:00

Hi,

Did you ever figure out how to add a shared mailbox back? I'm running into the same issue but removing the shared mailbox isn't something we can do easily and live with day to day.

Thanks!
Was this answer helpful?

3 people found this answer helpful.

0 comments No comments
Anonymous

2022-12-14T10:23:54+00:00

Hi,

No, the shared mailbox is still removed....
Was this answer helpful?

1 person found this answer helpful.

0 comments No comments
Anonymous

2023-02-02T06:54:54+00:00

The solution is to use this tool : https://office-reset.com and select the following option :

This download worked! Thank you so much!!!
Was this answer helpful?

20+ people found this answer helpful.

0 comments No comments
Anonymous

2023-02-05T18:48:49+00:00

I had been having similar problems on several clients' computers and this "office-reset" tool fixed them.

Many thanks!
Was this answer helpful?

6 people found this answer helpful.

0 comments No comments