When we install Exchange Server 2016 (CU23) but all existing database are dismount. and show error active manager operation failed mapiExceptionNoaccess: unable to mount database

Ronnachai Chintan 0 Reputation points

We tried check step and prerequisite everything are work fine and successful and then all database exchange server 2010 SP3 with (Rollup 32) are dismount but we try to mount database again but show error occur active manager operation failed mapiExceptionNoaccess: unable to mount database (hr=0x80070005) and we try to check legacy Exchange 2003/2007 garbage object but not found on adsiedit.msc (Exchange organization) or anything else. please help us to found out more solution.Untitled.png

Exchange Server
Exchange Server
A family of Microsoft client/server messaging and collaboration software.
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Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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  1. Amit Singh 4,861 Reputation points

    There can be multiple reasons for this error:

    • Missing transaction log files 
    • Exchange Information Store unable to start 
    • Not enough free disk space on the database or log file volume
    • Exchange “Dirty Shutdown” 
    • Corrupt Exchange Database Files

    Also, check this detailed article for help, and let me know if you are able to solve the issue or not - How to resolve unable to mount database (hr=0x80004005, ec=1108)

  2. Dezhi Li-MSFT 780 Reputation points

    Hi Ronnachai Chintan,

    1.Please try to run IPconfig /all to check whether your DNS is the IP of DC.

    2.Please check whether the exchange can communicate with DC normally.

    3.Has your exchange2016 been installed normally and can it run successfully?

    4.What version is your DC, did anything change to the DC when you installed exchange2016?

    Best Regards,


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