displaying blocks in web ui
in SAP Solman system, for example there are two users A and B. A user can see 'SAP collaboration' block in web ui but B user can not see the SAP collaboration' block like below screenshot.
I ve checked parametres, roles, profiles etc. in 'su01' t code and all items are the same.
How can i solve this problem that was displaying 'SAP collaboration' block for B user?