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I used Method 3 to remove &quot;Microsoft DSA&quot; with ADSIEdit.msc<br />
<br />
Method 3: Remove the SRS from Active Directory<br />
<br />
To remove the SRS from Active Directory, follow these steps:<br />
Start the ADSI Edit tool.<br />
Expand Configuration Container, and then expand CN=Configuration, DC=Domain, DC=com. <br />
Expand CN=Services, and then expand CN=Microsoft Exchange. <br />
Expand CN=Organization, and then expand CN=Administrative Groups.<br />
Expand CN=Servers, and then expand CN=Server.<br />
Right-click CN=Microsoft DSA, and then click Delete.<br />

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I used Method 3 to remove "Microsoft DSA" with ADSIEdit.msc

Method 3: Remove the SRS from Active Directory

To remove the SRS from Active Directory, follow these steps:
Start the ADSI Edit tool.
Expand Configuration Container, and then expand CN=Configuration, DC=Domain, DC=com.
Expand CN=Services, and then expand CN=Microsoft Exchange.
Expand CN=Organization, and then expand CN=Administrative Groups.
Expand CN=Servers, and then expand CN=Server.
Right-click CN=Microsoft DSA, and then click Delete.


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WORKED right away. Thank you so much. I was able to change to native mode.
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WORKED right away. Thank you so much. I was able to change to native mode.

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<div class="content wysiwyg-content">
Hello,<br />
I removed all ADC connectors from old exchange 5.5. exch 5.5 &nbsp;doesn't exist any more. Replicated all changes.<br />
Still can't change exchange mode from mix to native. I have one exchagne 2003 server sp2. Need to changed the mode because exchange 2010 installation fails. The option is grayed out. <br />
<br />
<br />
<br />
Please, help
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Hello,
I removed all ADC connectors from old exchange 5.5. exch 5.5  doesn't exist any more. Replicated all changes.
Still can't change exchange mode from mix to native. I have one exchagne 2003 server sp2. Need to changed the mode because exchange 2010 installation fails. The option is grayed out. 



Please, help

option to change exchnge organization from mix mode to native is grayed out

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.