Conversion of accdb files to odb file format

It appears you cannot directly convert Microsoft Access databases (.accdb, .mdb) to OpenOffice alternative (.odb files). It is not even possibly to open Access files in Base (both OoO and Libre), only connect MS Access database through wizard. When you connect to a foreign database using 3rd party tool, you can edit the data just fine, but you will keep them in original format. Some users were partially successful by dragging tables from a connected Access database to a newly created ODB database. For best help, it would be wise to check Base forums.

Open ACCDB file    Open ODB file