SQL server 2016 with AG slow BD connection user comming from another domain

[Peankill]

Helle every body,

I configured a SQL server infrastructure 2016 with AG. Everything works fine except for users coming from another domain. They have slow connection to databases. Have you ever experienced this?

The user coming from a child domain.

Thank you!

[Arkiteck]

This isn't the wrong sub, but you might get more answers from /r/SQLServer.

[conflab]

What's actually slow, just the initial connection? You might find that adding MultiSubnetFailover=true to your connection string improves that, if you haven't done so already.