Script Download: VerifyAndResetSRVRecords.zip
http://gallery.technet.microsoft.com/scriptcenter/Verify-and-reset-SRV-record-e9132d9a

This script could be used to both verify and reset SRV record on domain controller.

IT Administrators may need to check whether the SRV record is problematic, when DC locator cannot works.

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You can find more All-In-One Script Framework script samples at http://aka.ms/onescriptingallery