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Dynamics 365 Community / Forums / Microsoft Dynamics NAV (Archived) / NetFx40_LegacySecurity...
Microsoft Dynamics NAV (Archived)

NetFx40_LegacySecurityPolicy enabled : Impact of Removing or disabling this

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Posted on by DHAN RAJ 2

Hi,
Is there any security risk when

NetFx40_LegacySecurityPolicy enabled="true

is removed or changed to false in Microsoft.Dynamics.Nav.Client.exe.config?
Is it safe in terms of performance and security etc.? What are the disadvantages associated with this change?

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I have the same question (0)
  • mmv Profile Picture
    mmv 11,471 on at

    Hi,

    This is what MS says:

    Applying the <NetFx40_LegacySecurityPolicy> element can result in significant performance penalties for native image assemblies created by the Native Image Generator (Ngen.exe) that are not installed in the global assembly cache. The performance degradation is caused by the inability of the runtime to load the assemblies as native images when the attribute is applied, resulting in their being loaded as just-in-time assemblies.

    Best Regards,

    MMV

  • Community Member Profile Picture
    Community Member on at

     We have added this property and set it to true to support memory usage and performance of reports. We are also aware about this being a problem with some external add-ins that depend on this policy to be set to false.
    Note though, a possible issue has been reported recently when using this setting with value false: Depending on value of this switch and .net framework version, string comparison might yield different results in specific circumstances.
    To be exact: Reserved Quantity field (table 32, ILE) might show incorrect value (0), due to string interpretation of flowfield condition (Source ID = '', Source Batch Name = ''). This issue is being addressed.

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