I had a company-owned MacBook Pro that was locked to an Apple ID using a company email address. Whilst I had the Apple ID password, I only discovered that the laptop was locked to a personal Apple ID after we had enabled federation in ABM, and so all Apple IDs using [email protected] were claimed by ABM.
This then presented a problem as I couldn’t log in to turn off Activation Lock on the MacBook Pro as I didn’t know what the temporary Apple ID was.
Fortunately I found hidden in an Apple help article some information that pointed me in the right direction to guess it.
https://support.apple.com/en-us/102159
The format for a temporary Apple ID follows a pretty clear pattern:
[email protected] would then become
[email protected]
I was able to log in with this temporary Apple ID and the password that I already had, and then change it to an @iCloud.com email address to unlock the Mac.
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