vlw007

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

17

We have a few dozen tenants that have started to see this error popup when enumerating public folders: **An internal server error occurred. The operation failed., Unable to cast object...

App Impersonation is randomly failing

3

App Impersonation has been working for the last few year. However, now we see random errors on several tenants. It will work ok for 100 mailboxes, than fail for the...

Watermarks are broken: session is not IMailboxSession

1

We have been using Watermarks on Exchange mailbox and public folders for about two years. As of about 48 hours ago, they stopped working on Office 365. We have tried...

Tenant Cant Access Public Folder via EWS: Can't connect to the mailbox ...

1

We have gotten this message messages on dozens of tenants on a random basis: the specified object was not found in the store., Can't connect to the mailbox of user...

EWS Throttling issues being rolled out worldwide on 365

25

Starting April 6, we are seeing EWS throttling issues when there is barely any EWS activity on a tenant. The error looks like this: _[You have exceeded the available concurrent...