- Click Start, click Run, type
regedit in the Open box, and then press
- Locate and then click the following registry subkey:
- In the right pane, double-click
- In the Value data box, type a value of
3 that is appropriate for your environment1, and then click OK.
- Quit Registry Editor.
- Restart your computer.
1 LmCompatibilitylevel Values
2 - Clients use only NTLM authentication, and they use NTLMv2 session security if the server supports it. Domain controller accepts LM, NTLM, and NTLMv2 authentication.
3 - Clients use only NTLMv2 authentication, and they use NTLMv2 session security if the server supports it. Domain controllers accept LM, NTLM, and NTLMv2 authentication.
Source: How to get Windows to save password for Outlook Anywhere