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Fix Kantata Performance Degradation When Routed Through MCAS
Question details
Users are experiencing severe performance degradation and latency when routing the Salesforce-based Kantata application through Microsoft Cloud App Security.
- Product
- Microsoft Defender for Cloud Apps (MCAS)
- Device & OS
- not provided
- Scenario
- Accessing Kantata via an enterprise environment where web traffic is proxied through MCAS.
- Observed behavior
- Significantly slow load times and reduced responsiveness in browsers like Edge, Chrome, and Firefox, negatively impacting user productivity.
Before altering any configurations, test accessing Kantata directly outside of the MCAS environment to verify that the proxy is the definitive cause of the latency.
Collect Performance Diagnostics and Escalate to Microsoft Support
Because MCAS acts as a cloud-based reverse proxy, resolving complex latency issues requires empirical network data and investigation by Microsoft Defender specialists.
MCAS proxies intercept and evaluate web traffic in real time. This additional processing can occasionally cause timeouts or severe delays in heavy web applications like Kantata. Collecting Network HAR files and comparing latency metrics is crucial before reporting the issue.
Open Developer Tools in Edge, Chrome, or Firefox by pressing F12. Navigate to the Network tab and record the session latency while reproducing the sluggish behavior in Kantata.
Access Kantata using its direct URL (bypassing MCAS) and measure the load time. Compare these metrics against the load time when forced through the MCAS-proxied URL.
Navigate to the Microsoft Defender for Cloud Apps community forum on Microsoft Learn or TechCommunity. Submit your latency measurements, session details, and connector configurations for specialists to investigate.
Ensure Uninterrupted Productivity with WPS Office
While complex enterprise cloud proxy setups can cause frustrating latency in web applications, your desktop document creation should remain fast and reliable. WPS Office provides a lightweight, highly responsive, and completely free alternative to bulky office suites.
- 1. Download the installer: Visit the official WPS Office website to download the free, lightweight installation package.
- 2. Install quickly: Run the setup file and complete the fast installation process without any complicated enterprise network configurations.
- 3. Start working locally: Open your Microsoft Office formats directly in WPS Office for immediate, lag-free local editing.
Frequently Asked Questions
Why does MCAS routing slow down web applications like Kantata?
MCAS operates as a reverse proxy, meaning it intercepts, inspects, and reroutes web traffic to enforce security policies. This real-time inspection adds an extra hop and processing overhead, which can introduce noticeable latency for dynamic, resource-heavy web applications.
Can I bypass MCAS for certain applications in Edge or Chrome?
Yes, enterprise administrators can configure Conditional Access App Control policies within Microsoft Entra ID to exclude specific applications, user groups, or IP ranges from being routed through the MCAS proxy, thereby improving performance for trusted apps.
How do I export browser performance data to share with Microsoft support?
In your browser's Developer Tools (under the Network tab), right-click the network activity list after reproducing the slow load time and select 'Save all as HAR with content'. This exports a secure log of network requests and load times for support teams to analyze.
