# Checks After Migration or Upgrade

After migrating from 20.04.xx or upgrading from 24.08 to 26.04, do not consider the work complete until configuration, users and synchronization have been verified.

## Module checks

- Exchange Connector is listed in Module Manager;
- the installed version is the expected one;
- the configured Exchange type is correct;
- the required synchronization features are enabled;
- the license is valid;
- no blocking errors are shown on the Exchange Connector page.

## User checks

For each Exchange user, verify connection status, correct account, selected folders, any Resource/Impersonation settings and absence of authentication errors. For Microsoft 365, reconnect the user if access is no longer valid.

## Mapping checks

Open **Exchange Field Mapping** and check Contacts and Organizations, especially if custom mappings were used in 20.04.xx.

## Recommended test

1. Create a test record in vtenext and verify it reaches Exchange.
2. Modify it in Exchange and verify the change returns to vtenext.
3. Test a recurring event if used.
4. Test a Contact with e-mail and phone.
5. Test a Task with status and due date.
6. Test an Organization if organization synchronization is enabled.

## When the migration can be considered complete

The process is complete when the module is registered and upgradeable, all required users are connected, two-way tests succeed without duplicates, the mapping is correct and no persistent errors remain.