Hello,

We are getting flooded with alerts event code 106. Is there a problem with the counters. We also get these on our mailbox server also. The servers are exchange 2013 on prem. The we have 2 CAS and 4 mailbox servers. 

Application:MSExchange Common:106

Performance counter updating error. Counter name is Client-side Calls, category name is MSExchange Active Manager Client. Option

Performance counter updating error. Counter name is Unique servers queried, category name is MSExchange Active Manager Client. Optional code: 3. Exception: The exception thrown is : System.InvalidOperationException: The requested Performance Counter is no

Performance counter updating error. Counter name is Client-side Calls, category name is MSExchange Active Manager Client. Optional code: 2. Exception: The exception thrown is : System.InvalidOperationException: The requested Performance Counter is not a custom counter, it has to be initialized as ReadOnly. at System.Diagnostics.PerformanceCounter.InitializeImpl() at System.Diagnostics.PerformanceCounter.get_RawValue() at Microsoft.Exchange.Diagnostics.ExPerformanceCounter.get_RawValue() Last worker process info : System.ArgumentException: Process with an Id of 1832 is not running. at System.Diagnostics.Process.GetProcessById(Int32 processId) at Microsoft.Exchange.Diagnostics.ExPerformanceCounter.GetLastWorkerProcessInfo() Processes running while Performance counter failed to update: 7020 splunk-perfmon 588 services 976 svchost 384 TrustedInstaller 1368 svchost 6620 rdpclip 1168 rundll32 1560 inetinfo 5300 XenDpriv 1160 svchost 2144 XenGuestAgent 2340 Microsoft.Exchange.Directory.TopologyService 8444 conhost 956 LogonUI 2528 w3wp 2724 WmiPrvSE 6884 explorer 5472 nvwmi64 544 winlogon 3104 w3wp 772 nvvsvc 3292 MSExchangeFrontendTransport 2108 WMSvc 7228 w3wp 332 smss 1312 spoolsv 3872 rundll32 4856 WmiApSrv 6704 w3wp 5444 winlogon 3864 svchost 1104 VSSVC 6404 ccSvcHst 10552 vds 504 csrss 5032 Smc 6804 dwm 696 svchost 496 wininit 4632 rundll32 888 svchost 6600 w3wp 492 w3wp 2264 Ec2Config 1672 MSExchangeHMHost 2064 svchost 9512 splunkd 7972 w3wp 1860 SMSvcHost 872 svchost 5792 csrss 5592 MSExchangeHMWorker 1452 ruby 1840 svchost 6764 w3wp 1048 svchost 456 csrss 7152 w3wp 1388 bedbg 3996 Microsoft.Exchange.UM.CallRouter 4380 splunk-wmi 2812 WmiPrvSE 2024 ccSvcHst 3792 Microsoft.Exchange.ServiceHost 600 lsass 796 nvwmi64 5756 w3wp 1580 msdtc 2796 svchost 428 svchost 820 nvSCPAPISvr 1016 svchost 1996 svchost 1600 Microsoft.Exchange.Diagnostics.Service 4356 nvxdsync 4352 taskeng 608 lsm 4936 svchost 2964 beremote 6312 taskhost 1976 svchost 4 System 10640 conhost 0 Idle Performance Counters Layout information: FileMappingNotFoundException for category MSExchange Active Manager Client : Microsoft.Exchange.Diagnostics.FileMappingNotFoundException: Cound not open File mapping for name Global\netfxcustomperfcounters.1.0msexchange active manager client. Error Details: 2 at Microsoft.Exchange.Diagnostics.FileMapping.OpenFileMapping(String name, Boolean writable) at Microsoft.Exchange.Diagnostics.PerformanceCounterMemoryMappedFile.Initialize(String fileMappingName, Boolean writable) at Microsoft.Exchange.Diagnostics.ExPerformanceCounter.GetAllInstancesLayout(String categoryName)