A Security–Unsigned Add-In dialog box appears when launching Revit and appears similar to the image below.
The dialog box points to the CollaborateDB.dll and could present itself when launching multiple versions of Revit.
A Security–Unsigned Add-In notification occurs when the add-in cannot be verified by Revit. In this instance, the CollaborateDB.dll notification is caused by an expired the Security certificate.
The Digital Signature certificate expired on 1/9/2022.
The Security dialog box may appear for other Add-ins for various reasons. It’s important to understand what the Add-In is and determine if it is safe to load when launching Revit.
The ColloborateDB add-in is an important part of Revit and should be loaded upon launch. Performance issues may be experienced by a user if it is not loaded. Select “Always Load” the CollaborateDB Add-in and Revit will not prompt you again.
Revit will continue to work as expected.
If you experience similar dialog boxes with another Add-In then it’s important determine if the Add-In should be loaded. Follow the steps below to check if the Certificate for other Add-Ins have also expired. The steps below are instructions check the Certificate dates for CollaborateDB.dll. This process can be used for other files.
- Open File Explorer and browse to the location specified in the Security dialog box.
- Right click on the file (CollaborateDB.dll) to select Properties and open the Properties box.
- Go to the Digital Signatures tab, highlight the signature signer (Autodesk, Inc.) and then select Details.