diff --git a/changelog/unreleased/accounts-user-type.md b/changelog/unreleased/accounts-user-type.md
new file mode 100644
index 0000000000..f18ab9b210
--- /dev/null
+++ b/changelog/unreleased/accounts-user-type.md
@@ -0,0 +1,3 @@
+Bugfix: Specify primary user type for all accounts
+
+https://github.com/owncloud/ocis/pull/2364
diff --git a/proxy/pkg/user/backend/accounts.go b/proxy/pkg/user/backend/accounts.go
index 36241c4cbe..96b57fb5a0 100644
--- a/proxy/pkg/user/backend/accounts.go
+++ b/proxy/pkg/user/backend/accounts.go
@@ -144,6 +144,7 @@ func (a *accountsServiceBackend) accountToUser(account *accounts.Account) *cs3.U
 		Id: &cs3.UserId{
 			OpaqueId: account.Id,
 			Idp:      a.OIDCIss,
+			Type:     cs3.UserType_USER_TYPE_PRIMARY,  // TODO: once we have support for other user types, this needs to be inferred
 		},
 		Username:     account.OnPremisesSamAccountName,
 		DisplayName:  account.DisplayName,