You can configure a clock skew for applications that pass a timestamp in the URL query string. Possible applications include (but are not limited to) DocPop and OnBase Patient Window.
OnBase requires Epic authentication requests passed in a URL to include a timestamp. This timestamp is compared against the current time (in UTC) in the OnBase database to ensure the request is still valid.
By default, OnBase allows a difference (or skew) of up to five minutes between the timestamp in the URL and the database time. If the skew is greater than five minutes, then the login attempt is denied. You can increase or decrease the allowed skew as needed using the OnBase Configuration module.
To configure the clock skew for timestamps:
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In the OnBase Configuration module, select Utils | External Systems. The External System Configuration dialog box is displayed.
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Click Values. The External System Parameter Configuration dialog box is displayed.
