Hello,
New day, new problem !
Some users for an unknown were not able to connect to OWA and Outlook suddenly, I never had time to find why unfortunately…
The error in OWA was : X-OWA-Error: Microsoft.Exchange.Data.Storage.StorageTransientException
What I did to correct the issue was simply to modify one digit of the legacyExchangeDN, the last part which is random.
/o=blabla/ou=exchange administrative group (fydibohf24spdlt)/cn=recipients/cn=ef520295b5ab4cc3949fd9e06b7b6285-dbrooks
to
/o=blabla/ou=exchange administrative group (fydibohf24spdlt)/cn=recipients/cn=ef520295b5ab4cc3949fd9e06b7b6287-dbrooks
Hop this will save time in case it happens to you
Bye
AnotherUCBlog > Exchange, S4B, O365 
March 6, 2019 at 11:01 am
thx a lot ! you saved us man.
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