Dear team,
 
I have exchange 2013 and planning to move to 2016. can you please guide us how to go with this.
 
Regards,
 

We do have Exchange Migration tool called Efflux which helps to do the cross-forest migrations. To know more about Efflux Exchange Migrator, you may have a look into the following link :
https://help.hostingcontroller.com/EffluxMigration/
 
For Exchange Co-existence Migrations, you may get help from the technet help link given below :
https://docs.microsoft.com/en-us/exchange/upgrade-from-exchange-2010-to-exchange-2013-exchange-2013-help
 
If you are planning to migrate soon then we would advise you to get in touch with our support department by sending an email to support@hostingcontroller.com and they will help you further about it.