D365 F&O Enable Free Text Invoice Corrections

 To correct a free text invoice that has already been posted, open the posted free text invoice

Making use of this functionality can save you some time if you heavily use free text invoices and regularly have to correct them.

To Enable this function You need to go to System Administration >> Setup >> License configuration

Enable ( Free Text Invoice Correction ) under General Ledger 

To solve This and Enable Edit in this Form You need to enable Maintenance Mode.

1. This form is read-only unless the system is in the maintenance mode. Maintenance mode can be enabled in this environment by running maintenance job from LCS, or using Deployment.Setup tool locally

You can now turn maintenance mode on and off directly through Lifecycle Services (LCS) on your sandbox and production environments. Refer to the following steps to do this:

1. Go to the environment details page and on the Maintain menu, click Enable Maintenance Mode.

1. In the slider, set Turn maintenance mode on for the environment and select Confirm.
2. A servicing operation will begin and your system will go into maintenance mode.
3. On completion, the environment state will be In Maintenance. At this point, only the system administrator will have access to the environment.
4. After you are done making system-wide changes, you can turn off maintenance mode by clicking Disable Maintenance Mode under the Maintain menu.
5. This will start a servicing operation that takes your environment out of maintenance mode. You can see the progress of the operation in the environment details page.
6. After this is complete, your environment goes back to the Deployed state. Now all users can sign in to the environment.
7. You can check the environment history page to see when the maintenance mode was turned on or turned off. To get to the environment history page, select History and Environment changes on the environment details page.

Turning maintenance mode on and off for your sandbox and production environment is very similar to a servicing operation. If turning maintenance mode on or off fails, you will see options such as Resume, Rollback, and Abort. You also have the option to download the logs to troubleshoot why the operation failed.