Cookies in Dynamics 365 Customer Voice

A cookie is a small file sent from the web site to visitor's device by the browser. A single web session may use multiple cookies.

Dynamics 365 Customer Voice also uses cookies to store information for various purposes. The following table describes the cookies that Dynamics 365 Customer Voice uses, and their lifetime.

Cookie name	Description	Lifetime
AADNonce.forms	Unique identifier of one authentication session to prevent replay.	Session
DcLcid	Saves language preference.	90 days
MS0	Stores the session identification cookie.	90 days
MSFPC	Critical service cookie to analyze service usage anonymously and aggregated for statistical purpose.	1 year
MUID	Used to identify different anonymous users. Critical service cookie to analyze service usage anonymously and aggregated for statistical purpose.	1 year
_RequestVerificationToken	Used by the antiforgery system.	Session
AADAuth.forms	Microsoft Entra ID authentication token.	90 days
AADAuthCode.forms	An authentication code used to redeem Microsoft Entra ID authentication token.	90 days
AADSID.forms	Microsoft Entra ID authentication session ID.	90 days
AADState.forms	Authentication state to indicate whether user is authenticated.	90 days
FormsWebSessionId	Saves sign-in data for the session and tracks required data to run the service.	1 month
mc1	Used internally for telemetry purposes.	1 year