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Exchange 2013 Administrator corrupt mailbox ECP login blank

Inherited an Exchange 2013 server in which the main database became corrupt. A new database was built and the data was rebuilt from a backup using shadowprotect GRE (granular recovery of exchange).

The problem that I'm running into is that the Administrator user is stuck on the corrupt database, and when the administrator user logs into the enterprise control panel, the screen is blank. I can login with a different active directory user that has been added to the exchange administration group without any issues, but I was wondering if anyone knew a way to fix the administrator login and mailbox.
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IT Architect
Distinguished Expert 2017
Commented:
Best practice not to use administrator account. Better to keep it disabled. Using another account is preferred in production. Now, how to fix admin mailbox issue, you can delete the mailbox and recreate fresh one. Follow steps:
https://technet.microsoft.com/en-in/library/jj863440(v=exchg.150).aspx

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Commented:
I agree, we just disabled the user. Thanks!