To connect DigitalOcean Managed MongoDB to SimpleBackups, all we need is allow SimpleBackups IP addresses (if you are not using your own server for the backup), then get the correct connection string.
Step 1: Whitelist SimpleBackups' IP addresses
In this step, we will need to grab the full list of SimpleBackups' IP addresses and whitelist them (add them as trusted sources).
Step 2: Copy the connection string
After whitelisting SimpleBackups' IP addresses:
Click on Connection details as shown below
Select the Connection string option from the dropdown
Select the Database you want to back up and the User
Step 3: Paste the connection string in SimpleBackups
Make sure that:
MongoDB is selected as the database Type (you may need to click on Paste connection string instead if you do not see the connection string text field).
Paste the full Connection string we obtained from Step 2
And we are done!
Afterwards you can just validate the database backup and choose the backup storage destination as usual!