For CRM's or MAP's, the login is not tied to your password, but to an access/refresh token. If the token remains active, the password change will not affect your Data Sources/Targets for that system.
However, if your token is revoked (this can happen by an administrator manually or a setting that revokes a token upon password change or time limit), you will need to reauthenticate by logging into that system with username and password.
You will see a red exclamation point and "Please login again" in red on the data source/target card.
To resolve: Select the Data Source/Target card and click Configuration
You will be prompted to Add Account information again
After you have reauthenticated , the other sources/targets will be updated.
NOTE: Please look at other sources/targets for the system you have re-authenticated to make sure they have been updated. You may be required to enter Configuration settings and re-select the Account to authenticate.
For other systems, the process would be the same. Navigate to Configuration and add your Account information.
Once you've reauthenticated with your new password, all other sources/targets should update.
However, again please check all other sources/targets by visually reviewing if they have the red exclamation point and the words "Please login again". For these, accessing Configuration settings and selecting the correct account will update the credentials.