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I am working with SharePoint 2013 on-premise and I am running into an issue with the 'Sync to Outlook' task button.

When I try syncing the tasks to Outlook, the ULS logs read "401 Unauthorized ....reason="The tenant for realm 'my.domain.com does not exist.....";

I have determined that my issue is the SharePoint 2013 server is in one Forest and the Exchange 2013 server is in another. There is a discrepancy with the domain resolution, as SharePoint is requesting [email protected] but Exchange expects [email protected]

Is there a way I could setup a mapping for the Exchange security token (from SharePoint, or vice versa) that would translate the domain or realm that the user account should be resolved to in such a case? The base username is the same, but the domain is different.

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  • i think you may need to server-to-server authetication check this one technet.microsoft.com/en-us/library/…
    – Waqas Sarwar MVP ♦
    Commented Jun 19, 2015 at 15:46
  • I have performed that step @waqasSarwarMCSE but now I am faced with this error. Is there a switch that would allow me to specify the realm to be resolved?
    – Clinton Person
    Commented Jun 19, 2015 at 16:17
  • can you share the complete error?
    – Waqas Sarwar MVP ♦
    Commented Jun 19, 2015 at 19:36
  • @WaqasSarwarMCSE There is a lot of server specific information in the errors, and I have performed a fairly thorough analysis of the issue. Is there something unclear with my question?
    – Clinton Person
    Commented Jun 19, 2015 at 19:50
  • do you have both realm created? for my.doamin and another.domain.com
    – Waqas Sarwar MVP ♦
    Commented Jun 19, 2015 at 20:01

1 Answer 1

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This actually ended up being an issue of accepted domains on the Exchange server. I was having an issue because the email domain (another.domain.com), and the AD domain (my.domain.com) differs. The following PowerShell command will register the source (SharePoint 2013) domain on the Exchange Server:

New-AcceptedDomain 'my.domain.com' -DomainName 'Whatever I wanna call it' -DomainType 'internalrelay'

In a nutshell, this allows Exchange to accept the unknown domain, and resolve the account name appropriately against it's Exchange Organizations.

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