> I am signed in but my profile show this computer deactivated because I deactivated it by mistake so now when I sign into my microsoft apps I get an error message.
Could you provide the details or a screenshot of the error message?
Is your account an AAD account? Was your new computer disabled in Azure?
- If yes, you need to find someone who has administrator permission to re-enabled it from the Azure AD blade.
The similar threads, you may have a look.
Re-enable device
How to re-enable the device
Besides, to better help you, it's best add the tag "azure-active-directory" to find correct team to help you. - If not, as DSPatrick said, you could re-sign in Office apps with your licensed account to reactivate Microsoft 365 apps after deactivating the device.
Thanks for your understanding.
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