At a glance
| Provider | Microsoft Identity Platform |
|---|---|
| Category | Strictly necessary |
| Consent required? | No |
| Typical domain | .login.microsoftonline.com |
Do you need consent for buid?
No. buid is a strictly necessary cookie, exempt from consent under Article 5(3) of the ePrivacy Directive and Law 506/2004. You may use it without the visitor's prior agreement.
This is general guidance, not legal advice — always verify with a lawyer.
How FewCookies handles this cookie
FewCookies recognises buid from our database of 1,300+ known cookies and classifies it automatically as "Strictly necessary". The free check tells you whether this cookie is detected on your site and whether your banner handles it correctly — an instant, surface-level check, no account needed.
Frequently asked questions
Do you need consent for the buid cookie?
No. buid is a strictly necessary cookie, exempt from consent under Article 5(3) of the ePrivacy Directive and Law 506/2004. You may use it without the visitor's prior agreement.
What does the buid cookie do?
Cookie used by Microsoft Entra for service telemetry and protection mechanisms during authentication.
Who sets the buid cookie?
The buid cookie is associated with Microsoft Identity Platform and is classified as strictly necessary.