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Failed to login SharePoint 2019 site via UPN with a one-way trust domain

%3CLINGO-SUB%20id%3D%22lingo-sub-1052348%22%20slang%3D%22en-US%22%3EFailed%20to%20login%20SharePoint%202019%20site%20via%20UPN%20with%20a%20one-way%20trust%20domain%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1052348%22%20slang%3D%22en-US%22%3E%3CP%3EDear%20Sirs%2C%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EWe%20have%20two%20domains%3A%3C%2FP%3E%3CP%3EAAA.local%3C%2FP%3E%3CP%3EBBB.local%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EAnd%26nbsp%3Bthere%20is%20a%20one-way%20trust%20relation%3A%20AAA%20trust%20BBB%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EOur%20SharePoint%20Server%202019%20hosted%20on%20domain%20AAA.local%2C%26nbsp%3B%3C%2FP%3E%3CUL%3E%3CLI%3EUsers%20from%20both%20domains%20can%20sign%20in%20by%3A%26nbsp%3BDomain%5CUser%3C%2FLI%3E%3CLI%3EUsers%20form%20AAA%20can%20sign%20in%20by%20User%20Principal%20Name%3C%2FLI%3E%3CLI%3EBut%20%3CSTRONG%3Eusers%20from%20BBB%20can%20not%20sign%20in%20by%26nbsp%3BUser%20Principal%20Name%3C%2FSTRONG%3E%2C%20why%3F%3C%2FLI%3E%3C%2FUL%3E%3CP%3ECan%20anyone%20help%3F%20Many%20thanks.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-1052348%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3ESharePoint%20Server%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E
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GuangHui Wang
Established Member

Dear Sirs,

 

We have two domains:

AAA.local

BBB.local

 

And there is a one-way trust relation: AAA trust BBB

 

Our SharePoint Server 2019 hosted on domain AAA.local, 

  • Users from both domains can sign in by: Domain\User
  • Users form AAA can sign in by User Principal Name
  • But users from BBB can not sign in by User Principal Name, why?

Can anyone help? Many thanks.

 

 

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