Error message: The custom form cannot be opened

Error message: The custom form cannot be opened. Outlook will use an Outlook form instead. The form required to view this message cannot be displayed. Contact your administrator.

What does this message mean? Is there something I can do myself to correct it? It comes up everytime I get a calendar item for a meeting sent to my inbox.

Thank you. 


Question Info

Last updated December 4, 2018 Views 38,815 Applies to:

When do you get this error message?

What type of email account configured in Outlook (POP or IMAP or Exchange)?


Follow these steps to Clear Cache:

1.      On the Tools menu, click Options, and then click the ‘other’ tab.

2.      Click Advanced Options.

3.      In the Advanced Options box, click Custom Forms.

4.      In the Custom Forms box, click Manage Forms.

5.      In the Forms Manager box, click Clear Cache.


Also rename FRMCACHE.DAT to FRMCACHE.old

Copy and paste the below line in run command (Windows key + R) and click ok

C:\Users\<user name>\AppData\Local\Microsoft\FORMS

Note: Type your computer user name in the above location.


If the above steps does not help, repair Office from control panel> programs and features and verify the status.

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