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Exchange 2016

“550 5.1.1 RESOLVER.ADR.ExRecipNotFound” NDR error message when you send email messages…

phuong.nguyen 2020/02/26 - 11:22 AM 3

PROBLEMWhen you send email messages by using Microsoft Outlook in Office 365, you may experience one or both of the following issues:Symptom 1: You receive non-delivery reports (NDRs)Email messages or meeting invitations…

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Cisco Bug: CSCsh33982 – (E)SMTP Multiple Content-Type headers check is wrong

phuong.nguyen 2019/12/19 - 4:49 PM 0

Last ModifiedSep 23, 2017Products (1)Cisco ASA 5500-X Series FirewallsKnown Affected Releases7.2(1.25) 7.2(2)Description (partial)Symptom: The SMTP inspection make checks of the header Content-Type and…

Exchange 2013 / 2016 Enabling TLS 1.2

phuong.nguyen 2019/12/18 - 12:29 AM 0

I have recently been working with a customer to upgrade to Exchange Server 2016, one of the requirements is to enable TLS 1.2. The following will guide you through the preparation, implementation and then testing.For the testing I…

Exchange Server TLS guidance Part 3: Turning Off TLS 1.0/1.1

phuong.nguyen 2019/12/18 - 12:18 AM 0

OverviewIn part 3 of our Exchange Server TLS Guidance series, we introduce how to turn off TLS 1.0 and 1.1 in your Exchange Server deployment. Turning off TLS 1.0 and 1.1 can be a highly disruptive event if not planned and executed…

Exchange Server TLS guidance Part 2: Enabling TLS 1.2 and Identifying Clients Not Using It -Part 2

phuong.nguyen 2019/12/18 - 12:14 AM 0

OverviewIn part 2 of our Exchange Server TLS Guidance series we focus on enabling and confirming TLS 1.2 can be used by your Exchange Servers for incoming and outgoing connections, as well as identifying any incoming connection which…

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Exchange Server TLS guidance, part 1: Getting Ready for TLS 1.2

phuong.nguyen 2019/12/18 - 12:11 AM 0

Update: With the Office 365 deadline to have TLS 1.2 enabled being moved from March 2018 to October 2018 we have changed the timing of subsequent post releases; please see below!OverviewAs the realm of security in…

How to Blacklist/Block Sender Domain or an Email Address on Exchange?

phuong.nguyen 2019/10/30 - 2:53 PM 2

Exchange Server allows you to block (reject) emails from the unwanted sender domains or certain email addresses. This allows you to configure extra spam protection (in addition to the RBL Exchange filters we considered earlier),…

Khắc phục lỗi Exchange 2016 – 4.7.0 Temporary server error. Please try again later. PRX2/PX5

phuong.nguyen 2019/10/09 - 4:40 PM 0

1.Mô tả lỗiKinh nghiệm chia sẽ gặp phải, Một trong những khách hàng của chúng tôi đã gọi rằng tất cả Email của họ đã chuyển đến Thư mục Dự thảo trong OWA và không thể Gửi & Nhận Email qua Exchange 2016 Server. Chiều gửi ra có thể…

OWA / ECP không vào được nếu Chứng chỉ Microsoft Microsoft Server Server Auth hết hạn

phuong.nguyen 2019/10/09 - 4:20 PM 0

Nếu chứng chỉ "Microsoft Exchange Server Auth Chứng chỉ" không có trên các máy chủ Exchange trong tổ chức, hãy làm theo các bước sau để tạo và triển khai chứng chỉ OAuth mới cho máy chủ Exchange:1.Tạo chứng chỉ OAuth mới bằng cách chạy…

Resolve the ‘Auth Certificate Missing’ Error in Exchange 2016/2013

phuong.nguyen 2019/10/09 - 2:51 PM 0

Microsoft Exchange Server Auth Certificate is a self-signed certificate that allows connection with other servers like Lync, SharePoint, etc. These certificates are created at the time of the installation of Exchange Server. Exchange…

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