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Showing posts from January, 2017

Showing the Recipient history from the Out of Office feature using EWS

One interesting thing I learnt this week from a mailing list that I knew how it worked but didn't know the detail of was the OOF history feature. This feature has been around for ages and its what Exchange uses to ensure you don't receive more then one copy of an OOF message when you send to a mailbox where the OOF status is enabled. According to this KB  this list has a limit of 10000 entries and can cause problems at times like any feature so it give some details on how to manually clear it. The more interesting part for a developer is the property they mention PR_DELEGATED_BY_ RULE (or PidTagDelegatedByRule ). This property contains a list of all the Email Addresses that this Mailbox has sent an OOF message to while the OOF feature was enabled which is something you could do a few cool thing
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