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Salesforce: Marketing Cloud Feature Disruption: Marketing Cloud Login

Affected components: Marketing Cloud Login32 instances

Timeline of updates

1. update2026-09-25 09:12 UTC

   We're investigating an issue impacting login access to Stack 401 for Marketing Cloud Engagement. Affected users are unable to log in to this Stack. We've engaged multiple engineering teams to review database and caching services. We'll provide an update in 30 minutes or sooner if additional information becomes available.

2. update2026-09-25 09:50 UTC

   As we continue to investigate the login issue impacting Stack 401 in Marketing Cloud Engagement, we identified timeout errors on login token requests and are reviewing the health of the caching and database services connected to this Stack. We’ve also identified a high volume of login requests originating from a small number of integrations. We're implementing rate limits on these requests to see if this resolves the issue. We'll provide an update in 30 minutes or sooner if additional information becomes available.

3. update2026-09-25 10:26 UTC

   We've identified the specific integration that's generating a high volume of login requests to Stack 401 in Marketing Cloud Engagement and have applied rate limits to those requests. We’re validating the changes and monitoring login access. We've also confirmed there are no underlying database issues on the Stack. We'll provide another update within 30 minutes, or sooner if new information becomes available.

4. update2026-09-25 10:40 UTC

   We’ve resolved the issue that prevented some Marketing Cloud Engagement users from logging in to Stack 401. We applied rate limits to the high volume of login requests, and all services are now operating normally. We apologize for the impact this incident had on you and your business. We will undertake a full investigation of the incident, establishing the technical trigger, the underlying cause, and preventive action to avoid a repeat in the future.

Impact, status and times are the vendor’s own, as last archived. View on status.salesforce.com (opens in new tab). Salesforce profile · Recent Salesforce incidents · Markdown · JSON