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I have a two way domain trust setup between domain A, and domain B. &nbsp;our exchange server sits in domain A, but users in Domain B need access to thier mailboxes on it. &nbsp;I've given the users permissions on their mailboxes using thier domain B usernames via the trust, but when they try to send mail they get &quot;You do not have permissions to send to this recipient&quot; responses. &nbsp; I have tried to give them Send on Behalf of permissions, but get an LDAP Provider error from Active Directory Exchange Extension. &nbsp; Any help would be much appreciated.<br />
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I have a two way domain trust setup between domain A, and domain B.  our exchange server sits in domain A, but users in Domain B need access to thier mailboxes on it.  I've given the users permissions on their mailboxes using thier domain B usernames via the trust, but when they try to send mail they get "You do not have permissions to send to this recipient" responses.   I have tried to give them Send on Behalf of permissions, but get an LDAP Provider error from Active Directory Exchange Extension.   Any help would be much appreciated.



you do not have permissions (domain trust)

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.