Situation:I tried to do a manual GAL-update via powershell and i got the following error:WARNING: Object DOMAIN.LOCAL/Groups/VIE_MGMT has been corrupted andit is in an inconsistent state. The following validation errors have occurred:WARNING: Could not convert property WindowsEmailAddress to type SmtpAddress."V" is not a valid SMTP addressThen I tried the following as i found in the following:http://www.exchangeninjas.com/RecipientValidationSuggested Solution: This can be fixed by "trimming" the invalid whitespace from the displayname with a cmdlet one-liner like:Get-DistributionGroup | foreach {set-distributiongroup $_.identity -displayname $_.DisplayName.Trim()}What I recieved:[PS] C:\Windows\System32>Get-DistributionGroup VIE_MGMT | foreach {set-distributiongroup $_.identity -displayname $_.DisplayName.Trim()}Set-DistributionGroup : Could not convert property WindowsEmailAddress to typeSmtpAddress. "V" is not a valid SMTP addressAt line:1 char:64+ Get-DistributionGroup VIE_MGMT | foreach {set-distributiongroup <<<< $_.identity -displayname $_.DisplayName.Trim()}Any ideas to help me out? :)

that articlewould not be the issue i guess. the validation error is becasue the attribute windowsemailaddress is not what the AD expects it to be. do a get-distributiongroup <name> |fl and you will see that the value of attribute windowsemailaddress is "V". the email address attribute should be something@domain.com. Once you change that, this should go away.to do that try this: set-distributiongroup <name> -windowsemailaddress Something@domain.com and it should stop those validation errors.