AD Attributes that are changed when a mailbox moves to Office 365

There's not a lot of great documentation available on what values change when an on-prem mailbox moves to the cloud.   The full list is below, but it's important to note the following values since they are most often missed \ overlooked.


msExchRemoteRecipientType, previously null, will be set to 4


msExchRecipientTypeDetails gets changed from 1 to 2147483648


msExchRecipientDisplayType gets changed from 6 to -2147483642


Other values that change : legacyExchangeDN, homeMDB, homeMTA, homeServerName, ProxyAddresses, TargetAdddress

Comments (2)

  1. dkegg says:

    The values will change once the move is completed and Exchange on-prem changes the object type from UserMailbox to remote-UserMailbox. If you use "suspend when ready" for the MRS move, the values will NOT change until the move is finalized. For a new user,
    when you create their AD account and then use enable-remotemailbox or new-remotemailbox, Exchange onprem will set these values, however the msExchRemoteRecipientType value will be different, see my post from today about the msExchRemoteRecipientType attribute

  2. Ganesh Prakasam says:

    Hi When we perform move mailbox.. will it update FirstSynctime for active sync users. Does it has any relation with this parameter while moving mailbox. (local move)

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