Set-ExternalInOutlook -AllowList {sub.domain.ca} still tagging emails as External

%3CLINGO-SUB%20id%3D%22lingo-sub-2342001%22%20slang%3D%22en-US%22%3ESet-ExternalInOutlook%20-AllowList%20%7Bsub.domain.ca%7D%20still%20tagging%20emails%20as%20External%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2342001%22%20slang%3D%22en-US%22%3E%3CP%3EAfter%20configured%20Set-ExternalInOutlook%20to%20true%2C%20I%20noticed%20emails%20sent%20using%20our%20primary%20SMTP%20domain%20from%20on%20premise%20apps%20to%26nbsp%3B%3CEM%3Esub-domain-ca.mail.eo.outlook.com%20(%3C%2FEM%3EExchange%20Online)%2C%26nbsp%3B%20are%20still%20being%20tagged%20with%20External.%20I%20added%20our%20primany%20SMTP%20domain%20to%20the%20AllowList%2C%26nbsp%3B%22%3CEM%3Esub.domain.ca%22%3C%2FEM%3E%20but%20they%20are%20still%20being%20tagged%20as%20External.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EI%20was%20expected%20this%20would%20fix%20the%20issue%20but%20it%20has%20not.%20Is%20this%20expected%20behavior%20since%20it's%20using%20the%20same%20sub%20SMTP%20domain%3F%26nbsp%3B%3C%2FP%3E%3CP%3E%3CBR%20%2F%3Ethanks!%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-2342001%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EExchange%20Online%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EOutlook%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3ESet-ExternalInOutlook%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E
New Contributor

After configured Set-ExternalInOutlook to true, I noticed emails sent using our primary SMTP domain from on premise apps to sub-domain-ca.mail.eo.outlook.com (Exchange Online),  are still being tagged with External. I added our primany SMTP domain to the AllowList, "sub.domain.ca" but they are still being tagged as External.

 

I was expected this would fix the issue but it has not. Is this expected behavior since it's using the same sub SMTP domain? 


thanks!

 

2 Replies

Hi @K-ROD,

 

just wait. When I tested it,  after executing the commandlet the Allowlist behavior has been changed in 60 hours.

 

If you interested in GUI for "Set-ExternalInOutlook",  have a look at this.

Sorry, I forgot to mention it's been roughly a week now.