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FlippFlag for Australia asked on

Delivery has failed .... #550 5.1.1 RESOLVER.ADR.ExRecipNotFound

We recently migrated a SBS 2003 to Windows Server 2008 with Exchange 2010 with a new internal domain name:
Old: domain.local
New: domain.internal

We cleared out Outlook Nickname Cache of old addresses and replaced with new so to avoid this issue, but when ever a User replies to an email to an internal staff member Outlook will try and send using Old Domain Name.

Can I adjust User Accounts so both are accepted somehow so I dont have to adjust Outlook Nickname Cache etc.?
ExchangeActive DirectoryWindows Server 2008

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8/22/2022 - Mon
Simon Butler (Sembee)

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lol ... yeah just found this and other postings on this.

Thanks Simon.

Thanks again for quick reply - much appreciated.
I started with Experts Exchange in 2004 and it's been a mainstay of my professional computing life since. It helped me launch a career as a programmer / Oracle data analyst
William Peck