It's not the usual issue with menu items, but I think this utility rebuilds the menu.  I would just backup everything before I ran it, then double check everything after. KB 50506

1. Click File, Run
2. Enter SY_menu_ui and click OK
3. Click Reset button
4. Click Accept
5. Click Close
6. If report is still not available in Report Manager, remove record from ..\MAS90\MAS_SYSTEM\SY_Menu.M4T, run the SY_menu_ui utility as described above, then re-import the Custom Report using Report Manager.

The SY_Menu_UI utility did not resolve the problem.

I am trying to avoid adding 20 plus reports to the custom menus every time this happens.

Fortunately I did take a back up of the MAS90\Launcher\MNUMOD.TXT file so I can quickly restore the menu, but I don't know why this keeps happening. Perhaps there is some kind of refresh mechanism that rebuilds the file based on the records in a file, I don't know. Or perhaps this is more likely to happen if the Report Manager is used to add reports to a menu while users are currently logged into Sage.