Unable to view Purchase Requisition in SAPOffice Mails tab in UWL (Portal)

We are using SAP Netweaver Portal 7.3. We configured SomProviderConnector to pull SAPOffice mail from backend ECC system in UWL. We are able to fetch all the SAPOffice Mails. Most of the mails are initiated via PR object services option Send Object with Note in T-Code me52n. These email contain link to PR which gets opened in SAP Business Workspace but can not be opened from UWL's tab "SAPOffice Mails". We also configured Object Visualization in T-Code SWFVISU for object type BUS2105.

Would appreciate suggestions to resolve this issue.