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The SID's would be associated with the old dead domain, so you would need to delete them from the NK2 file in Outlook and have them recreated next time they compose an email.
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The SID's would be associated with the old dead domain, so you would need to delete them from the NK2 file in Outlook and have them recreated next time they compose an email.

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I have opened up their new Outlook profile, started entering the email address, deleted the cached entry, and then typed the entire email address and sent a message successfully. &nbsp;Tried to address another message, and the same SID issue is showing up again.
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I have opened up their new Outlook profile, started entering the email address, deleted the cached entry, and then typed the entire email address and sent a message successfully.  Tried to address another message, and the same SID issue is showing up again.

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A client of ours just moved to a new domain, as their PDC died. &nbsp;They use a hosted exchange service.<br />
<br />
When migrated to the new domain, one of the users has SID's showing up instead of an email address when they start composing an email address. &nbsp;Anyone seen this before?
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A client of ours just moved to a new domain, as their PDC died.  They use a hosted exchange service.

When migrated to the new domain, one of the users has SID's showing up instead of an email address when they start composing an email address.  Anyone seen this before?

Outlook Cached Address showing as SID

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

Outlook

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.