T33d33

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"Too many concurrent connections opened" errors with EWS OAuth in C#

We had the same issues with connecting to EWS it seems to be a throttling problem. You are not allowed to make too many connections and you cannot change the...

While enumerating Public Folders: Unable to cast object of type 'Microsoft.Exchange.Data.Storage.PublicFolderSession' to type 'Microsoft.Exchange.Data.Storage.IMailboxSession'.

We are experiencing same problem since 24.03.2021 08:00 CET.

While enumerating Public Folders: Unable to cast object of type 'Microsoft.Exchange.Data.Storage.PublicFolderSession' to type 'Microsoft.Exchange.Data.Storage.IMailboxSession'.

> We are experiencing same problem since 24.03.2021 08:00 CET. It's working again 26.03.20201 8:00 CET