Forum Discussion
Office 365 + local domain .local and external .com shows Users will not be able to sign-in azure ad?
We have office 365 premium.. i've set up our .com domain in the admin portal.. ran through the steps, except i did not add dns entries.. (we will do hybrid, both on site offsite for now, ie: exchange...
In short, Microsoft no longer recommends using .local suffix as they are non-routable domains. They have to be domain has to be a valid Internet domain (such as, .com, .org, .net, .us).
I have discussed this issue in this guide: https://techdirectarchive.com/2020/01/08/how-to-setup-dc-setting-up-the-two-domain-controllers/
Also, when you are using a non-routable domain, you will encounter issues as described in this guide and may want to find some workaround. https://techdirectarchive.com/2020/07/13/pass-through-authentication-how-to-synchronize-your-on-premise-ad-with-azure-ad-using-azure-ad-connect-tool/
As ou can see in this Microsoft guide, you are advised to use a routable domain henceforth: https://learn.microsoft.com/en-us/microsoft-365/enterprise/prepare-a-non-routable-domain-for-directory-synchronization?view=o365-worldwide
I have discussed this issue in this guide: https://techdirectarchive.com/2020/01/08/how-to-setup-dc-setting-up-the-two-domain-controllers/
Also, when you are using a non-routable domain, you will encounter issues as described in this guide and may want to find some workaround. https://techdirectarchive.com/2020/07/13/pass-through-authentication-how-to-synchronize-your-on-premise-ad-with-azure-ad-using-azure-ad-connect-tool/
As ou can see in this Microsoft guide, you are advised to use a routable domain henceforth: https://learn.microsoft.com/en-us/microsoft-365/enterprise/prepare-a-non-routable-domain-for-directory-synchronization?view=o365-worldwide