Post CU23 update excahnge issues

John Lenz 1,596 Reputation points

Server2012R2 Std
Exchange 2013 CU23
Patch applied

IN/out is working on mailboxes to outlook 2012/2019.
I tried OWA web access and got the login in then "bad request"
I went to exchanger sever and tried to launch "Exchange Administrative Center" and got this...

Could not load file or assembly 'Microsoft.Exchange.Common, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.

What happened and how do I correct it

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
6,509 questions
0 comments No comments
{count} votes

2 additional answers

Sort by: Most helpful
  1. KyleXu-MSFT 25,866 Reputation points

    @John Lenz

    Here are detailed information from above article, try to reinstall this KB with administrator rights:


    If the response is helpful, please click "Accept Answer" and upvote it.
    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

    0 comments No comments

  2. John Lenz 1,596 Reputation points

    My post did not take. Yes elevated now works

    0 comments No comments