When we try to add TUNNEL_EXCLUDE_DOMAINS client property, it limits only for 256 characters. Due to which we cannot add extra domains apart from default ones.

Default list:
app.launchdarkly.com,cis.citrix.com,cis-staging.citrix.com,cis-test.citrix.com,clientstream,launchdarkly.com,crashlytics.com,events.launchdarkly.com,fabric.io,firehose.launchdarkly.com, hockeyapp.net,mobile.launchdarkly.com,pushreg.xm.citrix.com,rttf.citrix.com,rttf-staging.citrix.com,rttf-test.citrix.com,ssl.google-analytics.com,stream.launchdarkly.com

Whereas we are able to enter only till, thus we cannot add extra domains to be excluded:
app.launchdarkly.com,cis.citrix.com,cis-staging.citrix.com,cis-test.citrix.com,clientstream,launchdarkly.com,crashlytics.com,events.launchdarkly.com,fabric.io,firehose.launchdarkly.com, hockeyapp.net,mobile.launchdarkly.com,pushreg.xm.citrix.com,rttf.citri

Engineering team has fixed the issue and it will be available in 10.9 RP4/ 10.10 RP3 and 10.11 CEM versions.. After updating the CEM, we will be able to enter characters with 4096 limit.
Till then we can use the workaround by modifying the html element from your browser and increase the maxlength to 4096, if required

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Problem Cause

Current limitation of Client property to handle only 256 characters