expiration time of refresh token and access token in bing API

Question

Could anyone tell me what is default expiration time of refresh token and access token provided by Bing API?

Answer 1

The official docs state the following:

Refresh tokens are, and always will be, completely opaque to your application. They are long-lived e.g., 90 days for public clients, but the app should not be written to expect that a refresh token will last for any period of time. Refresh tokens can be invalidated at any moment, and the only way for an app to know if a refresh token is valid is to attempt to redeem it by making a token request.

So basically, they recommend you as a developer not to rely on this time span.