MDAC (Microsoft Data Access Components) is a Microsoft framework to access almost any data store. 1and1Mail adopts MDAC when accessing Address Book. If there is a problem with the MDAC on your PC, 1and1Mail cannot work properly.

1and1Mail will encounter the following erros when MDAC cannot function properly:

  • 1and1Mail cannot star
  • Show error “Cannot find module… “
  • Show error “Erro creating object.Please verify that the Microsoft Data Access Compinents 2.1(or later ) have been properly installed”
  • Show error “Cannot find the application. The application may not be installed correctly.”

How to fix MDAC problem:

  • Install Microsoft Access on your PC. All Access versions include MDAC.
  • Install MDAC updates.