It’s a great mystery to understand where a Lync 2013 client pulls data from to present to a user when viewing the Contact Card of another user. While I haven’t found anything definitive on technet I was able to find some pretty good information from the Lync 2010 Resource Kit (Free E-Book). I hope this helps others who are looking for this information.
From Chapter one the Contact Merge is explained:
Lync aggregates contact information from multiple data sources and surfaces information in the Contacts list, contact card, and search results.
Lync performs duplicate contact detection by comparing the following properties of the Outlook contact and the GAL contact:
- SIP URI or instant messaging (IM) address
- Primary SMTP address
- All secondary SMTP addresses
If any of the values of these properties match between the Outlook and GAL contacts, then Lync merges the contacts. All contact data shown in Lync honors the following fallback logic with the exception of the Call menu.
For each property shown in Table 1:
If source1 is not empty
Property = source1
Else if source2 is not empty
Property = source2
Property = source3
Where Property, source1, source2, and source 3 are defined in Table 1.
|Property||Source 1||Source 2||Source 3|
|Display name||Outlook contact||Presence||AD DS|
|Title||AD DS||Presence||Outlook contact|
|Company||AD DS||Presence||Outlook contact|
|Department||AD DS||Presence||Outlook contact|
|Office||AD DS||Presence||Outlook contact|
|Organization (for example, Manager)||AD DS||Presence|
|Web Page (for example, MySite)||AD DS|
|Alias (mail nickname)||AD DS|
|Name Pronunciation||AD DS|
|IM address (SIPURI)||Presence||AD DS||Outlook contact|
|Email (primary SMTP address)||AD DS||Outlook contact||Presence|
|Work Phone||Presence||AD DS||Outlook contact|
|Home Phone||Presence||AD DS||Outlook contact|
|Mobile Phone||Presence||AD DS||Outlook contact|
|Other Phone||Presence||AD DS||Outlook contact|
For properties not listed in the table, the property values come from the following sources:
- Source 1 – AD DS
- Source 2 – Lync Server
- Source 3 – Outlook
- Source 4 – Microsoft® SharePoint® (only for skill search results)*
*For skills search, the hit highlights shown in the third and fourth line of search results are returned from SharePoint Designer only.
For the Call menu, phone numbers from AD DS, Lync Server, and Outlook contacts are aggregated and displayed.