In some cases you need to hide group members form Outlook or OWA users . you can hide the members by set “true” value to hideDLMembership Property. You can change the property with the GUI or by using POWERSHELL. For Example, if you have a group with name – “SecGroup” you can set the valueContinue reading “Hide Group Members Exchange”
Category Archives: Exchange Server
OWA Error – innerexception: microsoft.mapi.mapiexceptionadpropertyerror
When you try to brows user mailbox using owa you get this error : Issue The error message is:InnerException: Microsoft.Mapi.MapiExceptionADPropertyError Solution This error come from wrong Value of legacyExchangeDN attribut , you should delete the wrong value and put a good one for Example : /o=OrgName/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=UserAlias. SHMUEL H.
Exchange Emergency Mitigation (EM) service
When you install the September 2021 CU (or later) on Exchange Server 2016 or Exchange Server 2019, the EM service will be installed automatically on servers with the Mailbox role. Microsoft Exchange Emergency Mitigation (EM) provides the fastest and easiest way to temporarily resolve threats to connected on-premise Exchange servers before your IT security teamContinue reading “Exchange Emergency Mitigation (EM) service”
New Microsoft Exchange zero-day actively (RCE+SSRF) exploited in attacks
UPDATE Microsoft add updates: The tech giant has revised the blocking rule in IIS Manager from “.*autodiscover\.json.*Powershell.*” to “(?=.*autodiscover\.json)(?=.*powershell).” Also , Change the Condition input from {URL} to {UrlDecode:{REQUEST_URI}} and then click OK On Thursday, September 29, a Vietnamese security firm called GTSC published information and IOCs on what they claim is a pair of unpatched Microsoft Exchange ServerContinue reading “New Microsoft Exchange zero-day actively (RCE+SSRF) exploited in attacks”
New office365 tab behavior Exchange Admin
NEW TAB for Exchange hybrid customers accessing Office 365 tab in the Exchange admin center (EAC) for their on-premises Exchange servers. https://techcommunity.microsoft.com/t5/exchange-team-blog/new-office-365-tab-behavior-in-the-on-premises-exchange-admin/ba-p/3415018 SHMUEL H.
Released: May 2022 Exchange Server Security Updates
Microsoft released an SU for exchange servers. Starting with this release of Security Updates, Microsoft are releasing updates in a self-extracting auto-elevating .exe package These SUs are available for the following specific builds of Exchange Server: Exchange Server 2013 CU23 Exchange Server 2016 CU22 and CU23 Exchange Server 2019 CU11 and CU12 Manual run of /PrepareAllDomains is required : Because of additionalContinue reading “Released: May 2022 Exchange Server Security Updates”
Exchange 2022 Cumulative Update
After almost an year Microsoft released new cu for exchange 2019 and exchange 2016. the update includes the latest SUs including the updates released in the March 2022 SUs. As published on The Exchange Team (https://techcommunity.microsoft.com/t5/exchange-team-blog/released-2022-h1-cumulative-updates-for-exchange-server/ba-p/3285026) the most update are : Servicing Model Changes Microsoft announcing changes to there update delivery model for Exchange Server. Microsoft areContinue reading “Exchange 2022 Cumulative Update”
something went wrong OWA Exchange Server
After apply Security Update (SU) on exchange server you get the error : “something went wrong” (error 500) when you try to work with OWA. The two reasons for this error are : apply the SU without admin elevated permissions (run the msp file form “cmd window” without “run as administrator”) Missing or Expire AuthContinue reading “something went wrong OWA Exchange Server”
Microsoft March 2022 Patch Tuesday – fixes 71 flaws, 3 zero-days
Microsoft has fixed 71 vulnerabilities with three classified as Critical. Three of the bugs are listed as publicly known zero-days, but none of them are listed as having been exploited in the wild (thus far) : CVE-2022-21990 – Remote Desktop Client Remote Code Execution Vulnerability CVE-2022-24459 – Windows Fax and Scan Service Elevation of Privilege Vulnerability CVE-2022-24512 – .NETContinue reading “Microsoft March 2022 Patch Tuesday – fixes 71 flaws, 3 zero-days”
Recent emails might not appear in search results in the Microsoft Outlook desktop app KB5008212
After installing the November 22, 2021 or later updates, recent emails might not appear in search results in the Microsoft Outlook desktop app. This issue is related to emails that have been stored locally in a PST or OST files. It might affect POP and IMAP accounts, as well as accounts hosted on Microsoft ExchangeContinue reading “Recent emails might not appear in search results in the Microsoft Outlook desktop app KB5008212”