Shared mailbox rights inter-tenant collaboration

%3CLINGO-SUB%20id%3D%22lingo-sub-510864%22%20slang%3D%22en-US%22%3EShared%20mailbox%20rights%20inter-tenant%20collaboration%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-510864%22%20slang%3D%22en-US%22%3E%3CP%3EHi%2C%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EWe%20have%202%20tenants%20with%202%20company's%20with%20seperated%20environments%20with%20a%20AD%20trust%20between%202%20domains.%20Is%20it%20possible%20to%20give%20mailbox%20permissions%20from%20tenant%20A%20to%20tenant%20B%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3Eregards%2C%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3ERoy%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-510864%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EOffice%20365%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-510901%22%20slang%3D%22en-US%22%3ERe%3A%20Shared%20mailbox%20rights%20inter-tenant%20collaboration%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-510901%22%20slang%3D%22en-US%22%3E%3CP%3EOur%20issue%20does%20not%20involve%20the%20receiving%20of%20e-mails%2C%20but%20only%20the%20sending.%20Is%20there%20a%20way%20to%20send%20an%20e-mail%20from%20tenant1%20on%20behalf%20of%20tenant2%3F%20Receiving%20e-mails%20is%20not%20an%20issue.%20Replies%20to%20sent%20e-mails%20aren%E2%80%99t%20an%20issue%20either%20(could%20even%20be%20set%20up%20through%20reply-to%20address%20within%20tenant2%2C%20when%20sending%20mails%20from%20tenant1).%20Sole%20problem%20is%20that%20we%20need%20to%20send%20e-mails%20through%20the%20smtp%20of%20tenant1%20(due%20to%20application%20limitations)%20on%20behalf%20of%20a%20domain%20in%20tenant2.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-511301%22%20slang%3D%22en-US%22%3ERe%3A%20Shared%20mailbox%20rights%20inter-tenant%20collaboration%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-511301%22%20slang%3D%22en-US%22%3E%3CP%3ENo%2C%20cross-tenant%20permissions%20are%20not%20supported.%20If%20you%20need%20to%20send%20messages%20via%20a%20domain%20registered%20in%20another%20tenant%2C%20you%20either%20have%20to%20create%20an%20account%20there%2C%20or%20use%20an%20outside%20solution%20(make%20sure%20to%20adjust%20the%20SPF%20record%20accordingly).%3C%2FP%3E%3C%2FLINGO-BODY%3E
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New Contributor

Hi,

 

We have 2 tenants with 2 company's with seperated environments with a AD trust between 2 domains. Is it possible to give mailbox permissions from tenant A to tenant B?

 

regards,

 

Roy

2 Replies
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Our issue does not involve the receiving of e-mails, but only the sending. Is there a way to send an e-mail from tenant1 on behalf of tenant2? Receiving e-mails is not an issue. Replies to sent e-mails aren’t an issue either (could even be set up through reply-to address within tenant2, when sending mails from tenant1). Sole problem is that we need to send e-mails through the smtp of tenant1 (due to application limitations) on behalf of a domain in tenant2.

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No, cross-tenant permissions are not supported. If you need to send messages via a domain registered in another tenant, you either have to create an account there, or use an outside solution (make sure to adjust the SPF record accordingly).