Will an Exchange Server migration change UniqueIds? RRS feed

  • Question

  • Will the UniqueId of an appointment change if an Exchange Server is migrated from 2007 SP3 to 2013?

    According to this post (, "Your migration from 2007 SP1 (or later) to 2010 will not change the uniqueness of the identifiers."

    I would expect that all identifiers would remain unique, but will they change?

    Wednesday, January 14, 2015 10:28 PM