Microsoft throttles ingestion into Office 365 mailboxes and Personal Archives which can lead to a slow ingestion rate with Archive Shuttle or PST Flight Deck. This article explains some parameters that can be changed by Microsoft on request to improve the performance.
For customers with over 1000 accounts, the customer can create a ticket with Microsoft Support, to make an EWS throttling change.
In addition, the following can be requested to be changed which are not changed by default:EwsMaxConcurrency 27EwsCostThreshHold 50EwsMaxBurst UnlimitedEwsRechargeRate UnlimitedEwsCutoffBalance UnlimitedEwsMaxSubscriptions 20RcaMaxConcurrency 40RcaMaxBurst 150000RcaRechargeRate 900000RcaCutoffBalance UnlimitedCpaMaxConcurrency 20CpaMaxBurst UnlimitedCpaRechargeRate UnlimitedCpaCutoffBalance UnlimitedMessageRateLimit 30RecipientRateLimit 10000
If problems arise during the running of the Office 365 Leavers process in Archive Shuttle, the following can also be raised.PowerShellMaxConcurrency 20PowerShellMaxBurst 900000PowerShellRechargeRate 2520000PowerShellCutoffBalance 3000000PowerShellMaxTenantConcurrency 100PowerShellMaxOperations 400PowerShellMaxCmdletsTimePeriod 5ExchangeMaxCmdlets 200PowerShellMaxCmdletQueueDepth 100PowerShellMaxDestructiveCmdlets 120PowerShellMaxDestructiveCmdletsTimePeriod 60PowerShellMaxCmdlets 400PowerShellMaxRunspaces 20PowerShellMaxTenantRunspaces 200PowerShellMaxRunspacesTimePeriod 60
This Microsoft article helps understand what the settings in the policy mean.
