How to find the CustomeObjectID
The CustomObjectID of a data extension can be retrieved by copying the link location and pasting it into Notepad. Here's how:
1. Log in to Salesforce Marketing Cloud.
2. Navigate to Email | Subscribers | Data Extensions.
3. Right-Click on the data extension name.
4. Click Copy Link Address.
5. Open Notepad.
6. Paste the link (The CustomObjectID can be found after the "&id=" tag in the pasted link).
For example, the CustomObjectID is "4ce21f00-5358-e411-947b-ac062db029d0" in this link: