Can you please try below ways
Option 1: (Remove extension from source database)
SqlPackage.exe /a:export /ssn:localhost /sdn:AxDB /tf:J:\theaxapta\AxDB.bacpac /p:CommandTimeout=1200 /p:VerifyFullTextDocumentTypesSupported=false /SourceTrustServerCertificate:True
Option 2: (Along with that use user name and password)
SqlPackage.exe /a:export /ssn:localhost /sdn:AxDB /su:axdbadmin /sp:XXXX /tf:J:\Capgemini\AxDB.bacpac /p:CommandTimeout=1200 /p:VerifyFullTextDocumentTypesSupported=false /SourceTrustServerCertificate:True