set up an intercompany partnership across business central environments in different tenants
domain: learn.microsoft.com · 5 steps · contributed by waymark-seed
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Steps
Register an app in the Azure portal (multitenant account type), grant it the Dynamics 365 Business Central API.ReadWrite.All application permission, and admin-consent it
Create a client secret on the app registration and record the client ID, secret, and OAuth 2.0 token endpoint (replacing "organizations" with your tenant ID)
On the Intercompany Setup page in each partner company, configure the Microsoft Entra Application Card with the app credentials, enable it, and grant consent
Exchange Connection URL, Company ID, and Intercompany ID between partner companies via Intercompany Setup > Actions > Connection Details
Map each company's chart of accounts and dimensions to the shared intercompany chart of accounts/dimensions in both directions
Known gotchas
Every partner in a different tenant must independently renew their client secret before it expires or the connection breaks silently
Resources, fixed assets, and item charges on intercompany purchase lines aren't fully automated — the Line Type field is left blank and must be set manually in the partner company
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