On Saturday, September 8, AdWords and DFP systems will be unavailable from approximately 10:00am to 11:00am Pacific Time (17:00 to 18:00 GMT) due to system maintenance. A longer downtime will also be scheduled in the next few weeks -- please stay tuned for another blog post with more specific details.

During this time, your campaigns will continue to run as usual (with the settings you established as of 10am PST), but you won’t be able to sign into your account or make changes. Requests to the AdWords API will fail with an HTTP 50x error during the maintenance window. Please also keep in mind that any automated rules scheduled during this time will not run and AdWords scripts will not execute during this period. We encourage you to verify your campaign settings prior to the outage.

As mentioned above, ad serving will continue to run per changes made prior to the downtime period. If you use the audience feature in your network, any API call to the AudienceSegmentService service will fail with a SegmentError.UNEXPECTED_ERROR error. Also, if you target any audience segments in your line items, any calls to LineItemService, ForecastService, or LineItemCreativeAssociationService that involve those line items will fail.

We apologize for any inconvenience, and appreciate your patience as our engineers work to keep AdWords and DFP running smoothly.