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9,759 questions
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Hi @Alpatch ,
Welcome to our forum!
Please Kindly understand that our forum only supports English at present, so we suggest to use English to describe the problem. And I tried to use machine translation to understand your problems, If there is any discrepancy with your expression, please forgive me!
For the error you provided, i found a similar issue as yours, which mentioned that "this issue occurs because there are additional characters in the French translation of messages returned for the MSExchangeHMWorker.exe process. These additional characters trigger the "System.FormatException" error". Please check if it is your issue: "System.FormatException" error is logged in Event Viewer when Exchange Server 2013 runs on a French operating system.
If it's not your issue, please provide more information about your case:
- What's your account? Exchange on-premises account or anything else?
- Do other users in your organization encounter the same issue?
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
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