Knowledge Base

Multivalue AD attributes are not displayed in email signatures


Your email signature contains a placeholder with a multivalue AD attribute (e.g. Description, otherTelephone, otherHomePhone, postOfficeBox, etc.). This placeholder is not filled with information from your Active Directory. As a result, you end up having an empty field in your signature layout.


This problem affects users in hybrid environments in which local AD attributes are synced to Office 365 via Azure AD Connect.


This issue is related to Azure AD only – it's not connected to our software. Although it is possible to sync multivalue attributes from an on-premises Active Directory, currently there is no way to use them either across Microsoft 365 (as stated in this Microsoft's article) or by any third-party applications. Microsoft does not share information if and when there will be a fix to support multivalue attributes. There is no solution or workaround as of now.

If you are having this problem, we recommend that you use only single-value AD attributes as placeholders in your email signatures.

How to check if an AD attribute is single- or multivalued

To check if an Active Directory attribute is single-valued or multivalued, you need to:

  1. Find your attribute on this page and click it.
  2. Navigate to the table dedicated to your version (implementation) of Exchange Server and check the value in the Is-Single-Valued row.
  3. If the value is True (Fig. 1.), then you have a single-value attribute supported by CodeTwo Email Signatures for Office 365.

Fig. 1. Checking if an AD attribute is single-valued.

Was this information useful?