The Custom Form Cannot Be Opened. I've run into a similar problem when jumping back and forth between mine and customer tenants and various logins. If the above steps does not help, repair office from control panel> programs and features and verify the status.
Custom form
If the above steps does not help, repair office from control panel> programs and features and verify the status. Open outlook, click on the affected folder (contact folder), click properties, and change the default form to be used back to the standard form (ipm.contact). In the forms manager dialog box, click clear cache. Outlook will use an outlook form instead. Add the user with full control to the hkey_users registry key. (please back up it before you delete it) check if the issue persists. Web the custom form cannot be opened. Locate the folder where you want to create a new item; If forms are listed you do not need then delete them. Web click custom forms (about halfway down).
It can also be helpful to rename (or delete) frmcache.dat to frmcache.old. Locate the folder where you want to create a new item; Check if microsoft outlook item uses a correct form. To get things working right, i have to make to sign out of each microsoft service before signing into. Add the user to the local administrator group for the computer (this is forbidden and cannot be the solution) the ev environment is: In the custom forms dialog box, click manage forms. If the above steps does not help, repair office from control panel> programs and features and verify the status. To create a new profile in outlook refer: Add the user with full control to the hkey_users registry key. Change the setting to ipm.contact and check if it helps. It can also be helpful to rename (or delete) frmcache.dat to frmcache.old.
