[LightDestory]

@"Hidden Refuge"

A note though about "Evaluation Center" stuff. You cannot activate these Windows versions usually after the trial period has ended. MSDN ISOs however are normal ISOs of DVDs you would basically get when buying Windows and these of course can be activated easily with a key.

I checked the Enterprise ISOs provided by the tech-bench I linked, unfortunately they are "Evaluation" editions (I will demonstrate that below), they can't be activated nor upgraded to "normal edition". So after 180/90 days you are done. However they works like the "normal edition" so they are also suitable to play around with VMs.
@rudra 

i have a iso of s version of this saved as

en_windows_10_enterprise_ltsc_2019_x64_dvd_74865958.iso

The S edition for consumer Windows 10 was a locked edition that couldn't run win32 application. What means the S for Enterprise edition? 

• 17763.107.101029-1455.rs5_release_svc_refresh_CLIENTENTERPRISEEVAL_OEMRET_x64FRE_en-us.iso (From Tech-Bench by WZT)
  
  Code: (Select All)

  Index : 1
Name : Windows 10 Enterprise Evaluation
Description : Windows 10 Enterprise Evaluation
Size : 14.588.248.978 bytes
WIM Bootable : No
Architecture : x64
Hal : <undefined>
Version : 10.0.17763
ServicePack Build : 107
ServicePack Level : 0
Edition : EnterpriseEval
Installation : Client
ProductType : WinNT
ProductSuite : Terminal Server
System Root : WINDOWS
Directories : 19398
Files : 89642
Created : 30/10/2018 - 00:53:33
Modified : 30/10/2018 - 01:12:45
Languages :
        en-US (Default)
• en_windows_10_enterprise_ltsc_2019_x64_dvd_74865958.iso (From magnetic collection)
  
  Code: (Select All)

  Index : 1
Name : Windows 10 Enterprise LTSC
Description : Windows 10 Enterprise LTSC
Size : 12.684.483.229 bytes
WIM Bootable : No
Architecture : x64
Hal : <undefined>
Version : 10.0.17763
ServicePack Build : 1
ServicePack Level : 0
Edition : EnterpriseS
Installation : Client
ProductType : WinNT
ProductSuite : Terminal Server
System Root : WINDOWS
Directories : 17387
Files : 75395
Created : 15/09/2018 - 11:26:40
Modified : 15/09/2018 - 11:41:41
Languages :
        en-US (Default)

Index : 2
Name : Windows 10 Enterprise N LTSC
Description : Windows 10 Enterprise N LTSC
Size : 12.269.201.471 bytes
WIM Bootable : No
Architecture : x64
Hal : <undefined>
Version : 10.0.17763
ServicePack Build : 1
ServicePack Level : 0
Edition : EnterpriseSN
Installation : Client
ProductType : WinNT
ProductSuite : Terminal Server
System Root : WINDOWS
Directories : 17054
Files : 73593
Created : 15/09/2018 - 11:25:57
Modified : 15/09/2018 - 11:42:03
Languages :
        en-US (Default)

As you can see the ISO from Tech-Bench has only 1 index and it is clearly defined as Evaluation. Meanwhile the iso from magnetic collections has the usual 2 indexes. As you can see both iso contains the same Windows build 10.0.17763

Here the activation report from a clean install of tech-bench iso:


Getting a Enterprise ISO seems a little tricky, all the ISOs for Windows and Microsoft Office from that Tech-Bench are all genuine Retail (convertible to VL) edition from MSDN. My theory is that Enterprise is not available from "customer" MSDN. So only business clients can access to that isos. 

But I have to say that we are on 2019... you can get them is "some ways" by just searching Windows 10 Enterprise [BUILD] iso download/torrent and you will get it. Checksums hashes are really easy to get, so you can check if what you downloaded is genuine.