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I upgraded to Windows from 2019- 2022 to Windows 2025 I upgraded On Prem Exchange first and got errors in Exchange& Outlook. I upgraded one of my DC to 2025 and have more errors. Need to install 2025 on one more DC, (instal fails) or create new DC and then work through errors. Exchange not syncing with desktop Outlook. Emails are being received and sent on Mobile App.
N° de projet : 40235966
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10 freelances proposent en moyenne $29 AUD/heure pour ce travail

Hello, I understand you upgraded from Windows Server 2019-2022 to Windows 2025 and faced issues with the DC, Exchange, and Outlook syncing. My plan is to stabilize AD by adding a new 2025 DC (or promoting an existing one) with clean DNS/GC config, then finish the Exchange upgrade and fix mail flow so desktop Outlook sync works again. I’ll also verify mobile mail flow, create a reliable rollback path, and document steps to prevent similar issues. I’ll work step by step: validate prerequisites, check AD health, ensure proper Domain/Forest functional levels, install the second DC, run Exchange setup with the correct roles, and fix certificate and Autodiscover issues. I’ll keep you updated and deliver a tested, repeatable procedure. What is your top priority first: stabilizing AD replication, finishing Exchange upgrade, or restoring desktop Outlook syncing? Important questions I will cover with you: What is your current AD topology (sites, DC roles, and DNS setup)? Which Exchange version and build are you targeting after upgrade? Are there any specific errors from Event Viewer or Setup logs? Have you run AD health checks and broken replication between DCs? Is Outlook failing on a specific profile or across all users? Which attestations exist for Autodiscover and certificate configuration? What is your current backup/rollback plan if something goes wrong? Do you have any custom scripts or third-party tools impacting Exchange or AD? What is the expected timeline for the cutover o
$35 AUD en 21 jours
6,0
6,0

Hi there, I'm a System & Network Administrator with 7 years of experience in Exchange. I would love to assist you in this. Let me know a good time if we can discuss. Thanks !
$50 AUD en 10 jours
5,7
5,7

Dear , We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. We are 25 years in this business and our technical specialists have strong experience in Technical Support, Microsoft Exchange, Active Directory, Windows Server and other technologies relevant to your project. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Sales department Tangram Canada Inc.
$30 AUD en 5 jours
4,5
4,5

I have extensive experience in Technical Support, Microsoft Exchange, Active Directory, and Windows Server, making me a perfect fit for the "DC Exchange and Server 2025" project. I am confident in my ability to troubleshoot the errors you are facing with Exchange and Outlook after the Windows upgrade. Rest assured, I am willing to adjust the budget based on a detailed discussion of the project scope. Please review my 15-year-old profile to see my track record of client satisfaction. Let's connect to discuss the job details and get started right away. Your satisfaction is my top priority, and I am ready to showcase my commitment to this project. Looking forward to hear from you.
$18 AUD en 3 jours
3,5
3,5

Hello, I’m an IT expert with over 20 years of experience in the industry. I hold certifications as a Cisco Certified Networking Professional (300-100 and 300-115), Linux Certified Professional (LPI 101, 102, 103), Red Hat Certified System Administrator, VMware Certified Professional (versions 4, 5, and 5.5), as well as being a Microsoft System Administrator/Engineer from 2003 to 2022 and AZ104
$50 AUD en 40 jours
3,1
3,1

Hi, I am a full-stack developer with 8 years of rich experience in software development, with a strong background in Windows Server administration, Active Directory domain services, Microsoft Exchange (on-prem), Outlook troubleshooting, and enterprise infrastructure debugging. I'm an individual freelancer and can work in any time zone you prefer. For your environment, I can review the AD forest/domain functional levels, replication health, FSMO roles, DNS configuration, and Exchange schema/state after the upgrade to identify what’s breaking Outlook sync. I’ll diagnose Exchange services, Autodiscover, certificates, virtual directories, and mailbox database health to restore proper desktop Outlook connectivity. If the additional 2025 DC install is failing, I can either safely promote a clean new DC or stabilize replication first before retrying promotion to avoid further schema or replication issues. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.
$15 AUD en 40 jours
2,0
2,0

⭐⭐⭐⭐⭐ To resolve your issue with the Windows Server 2025 upgrade, CnELIndia, led by Raman Ladhani, can provide expert support through the following steps: Troubleshoot Exchange & Outlook Issues: We’ll investigate and resolve the Exchange and Outlook syncing issues by verifying configurations, addressing connectivity issues, and ensuring proper setup of mail profiles. DC Installation & Upgrade: We will assist with successfully installing Windows Server 2025 on your second DC by troubleshooting installation errors and ensuring the server meets all necessary prerequisites. Active Directory Synchronization: Our team will work through Active Directory replication and synchronization issues between your DCs, ensuring consistency and stability. Comprehensive Error Resolution: We will conduct a detailed review of all system logs and event errors, resolving conflicts between the new OS and existing services to ensure full functionality. Raman Ladhani’s expertise, combined with CnELIndia's experience, ensures a seamless transition to Windows Server 2025 with minimal disruptions.
$20 AUD en 40 jours
0,0
0,0

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