In many small companies every tool has its own password. The CRM is one more login, often with a password that is reused or shared, and MFA set up by some users but not all. When someone leaves, their email is switched off on the last day, but their CRM account is only noticed weeks later. Pomio CRM recommends single sign-on (SSO) for the CRM as soon as the company already has one central work account per person, and the CRM can use it.
What single sign-on changes
With SSO the CRM no longer keeps its own password for each user. People sign in with their Microsoft 365 or Google Workspace account, and that account provider confirms who they are. It fits the rule that every CRM user has their own login: the login is simply the work account the person already has, not a shared or extra account.
MFA in one place
The question of whether a CRM needs MFA becomes easier with SSO. You enforce multi-factor authentication once, for the work account, and it then applies to the CRM, email and every other connected tool. There is no separate setting per tool that someone forgets to switch on.
Leavers lose access automatically
The biggest gain is at the end of employment. Disabling the work account closes CRM access at the same moment, which makes it much easier to suspend a CRM user on their last day. Still suspend or deactivate the CRM user itself and reassign their open deals, because SSO only blocks the login; it does not hand over customers or records.
What SSO does not do
SSO answers who someone is, not what they may do. Roles, visibility and rights such as export or delete stay in the CRM and still need to be set and reviewed. SSO also makes the identity provider a dependency: if it is unavailable or misconfigured, nobody can log in. That is why you keep one emergency administrator login that works without SSO, with a strong password and its own MFA, stored securely and used only when SSO fails. Count it in the number of administrators you allow.
A practical rule for SMEs
Switch on SSO for the CRM when all users already have a central work account and the CRM supports it. Turn off the separate CRM password for normal users once everyone has signed in successfully via SSO, so there are no two ways in. Keep one documented emergency admin login, and check in the quarterly access review that it still works and that nobody else uses it.