When I try to connect to a MS Access 2016 database, it connects perfectly without password, but when I try to connect to the same database after encrypting it with a passwor
Hope your connection string as follows,
"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=[Path];Jet OLEDB:Database Password=[Password];"
So, you used Microsoft.ACE.OLEDB.12.0 driver
and must be installed on your machine, as it doesn't come with windows. you can find the driver on this link
And hope this post also help to you. and also this
How to use access connection strings: https://www.connectionstrings.com/access/